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                         REVISED November 15, 2018

           IN THE UNITED STATES COURT OF APPEALS
                    FOR THE FIFTH CIRCUIT    United States Court of Appeals
                                                      Fifth Circuit

                                                                            FILED
                                                                       October 24, 2018
                                      No. 17-60736
                                                                         Lyle W. Cayce
                                                                              Clerk
WORLDCALL INTERCONNECT, INCORPORATED, also known as Evolve
Broadband, Complainant,

                Petitioner

v.

FEDERAL COMMUNICATIONS COMMISSION; UNITED STATES OF
AMERICA,

                Respondents

AT&T MOBILITY, L.L.C.,

                Intervenor


                      On Petition for Review of an Order of the
                       Federal Communications Commission


Before KING, ELROD, and HAYNES, Circuit Judges.*
KING, Circuit Judge:
      Worldcall Interconnect, Inc., petitions this court for review of the FCC’s
order denying its application for review. Worldcall filed a complaint with the
FCC after it and AT&T Mobility, L.L.C., were unsuccessful in negotiating



      *   Judge Elrod concurs in the judgment only.
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                                 No. 17-60736
terms for a roaming agreement. In its complaint, Worldcall alleged that AT&T
had proposed terms that violated the FCC’s roaming rules and refused to
accept terms that complied with these rules. The FCC’s Enforcement Bureau
found that AT&T’s proposed rates did not violate its roaming rules. Worldcall
sought review of the Bureau’s order from the FCC, which denied its
application. Worldcall now petitions this court for review. We DENY the
application.
                                       I.
                                       A.
      The concept of roaming is familiar to the average cellphone user. What
the average cellphone user, or even the average lawyer, is likely unfamiliar
with is the complex regulatory framework that underlies the use and provision
of those services. This case concerns that framework.
      A roaming transaction consists of three parties: the subscriber (i.e., the
cellphone user), the host provider, and the home provider. The subscriber
purchases wireless service from the home provider. When traveling outside of
the home provider’s network area, the subscriber uses the host provider’s
network infrastructure to receive mobile services. For this to be possible, the
home provider and host provider must enter into an agreement granting the
home provider’s subscribers use of the host provider’s network.
      The Federal Communications Commission (the “Commission”) regulates
roaming services. The Communications Act of 1934 (the “Act”), 47 U.S.C. §§
151-624, empowers the Commission to regulate wire and radio communication
in the United States, including roaming services.
      The Commission’s regulation of roaming services reaches back to the
early 1980s, see Cellco P’ship v. FCC, 700 F.3d 534, 538 (D.C. Cir. 2012) (citing
An Inquiry Into the Use of the Bands 825-845 MHz & 870-890 MHz for Cellular
Commc’ns Sys. and Amendment of Parts 2 & 22 of the Comm’n’s Rules Relative
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to Cellular Commc’ns Sys., 86 F.C.C.2d 469, 502 (1981)), but only two
comparatively recent regulatory developments require discussion here. The
first came in 2007, when the Commission issued an order concerning automatic
roaming. Reexamination of Roaming Obligations of Commercial Mobile Radio
Serv. Providers, 22 FCC Rcd. 15817, 15818 (2007) (“Automatic Roaming
Order”). In the Automatic Roaming Order, the Commission defined automatic
roaming as a service with which “a roaming subscriber is able to originate or
terminate a call in the host carrier’s service area without taking any special
actions.” Id. app. A at 15850 (amending 47 C.F.R. § 20.3). Automatic roaming
is defined in contrast to manual roaming, which requires special action on the
part of the subscriber—typically providing a credit card number to the
carrier—before the other network can be used. Id. The Automatic Roaming
Order provided that host carriers must provide automatic roaming “upon
reasonable request” and “on reasonable and nondiscriminatory terms and
conditions.” Id. app. A at 15851 (amending 47 C.F.R. § 20.12). The order cabins
the application of this obligation, however, to (1) “CMRS [commercial mobile
radio service] carriers” who “offer real-time, two-way switched voice or data
service that is interconnected with the public switched network” and (2) “the
provision of push-to-talk and text-messaging service by CMRS carriers.” Id.
CMRS had been previously defined under 47 C.F.R. § 20.3 as “a mobile service
that is: (a)(1) Provided for profit, i.e., with the intent of receiving compensation
or monetary gain; (2) An interconnected service; and (3) Available to the public,
or to such classes of eligible users as to be effectively available to a substantial
portion of the public; or (b) The functional equivalent of such a mobile service.”
      Importantly, the Automatic Roaming Order expressly did not extend to
noninterconnected data services, including Mobile Broadband Internet Access
Services (“MBIAS”). Automatic Roaming Order, 22 FCC Rcd. at 15839.
Responding to increases in the use of noninterconnected data services and the
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difficulty of small providers in obtaining roaming agreements from larger
carriers, the Commission promulgated the Data Roaming Order in 2011. 26
FCC Rcd. 5411, 5416 (2011) (“Data Roaming Order”). The Data Roaming Order
applied to “all facilities-based providers of commercial mobile data services
[CMDS],” id. app. A at 5458 (amending § 20.12), and defined CMDS as “any
mobile data service that is not interconnected with the public switched network
and is: (1) provided for profit; and (2) available to the public or to such classes
of eligible users as to be effectively available to the public.” Id. app. A at 5457
(amending § 20.3). Under the Data Roaming Order, providers of CMDS are
required to “offer roaming arrangements to other such providers on
commercially reasonable terms and conditions,” subject to limitations. Id. app.
A at 5458 (amending § 20.12). The only limitation relevant here is the
understanding that “providers may negotiate the terms of their roaming
arrangements on an individualized basis.” Id. The Commission assesses
commercial reasonableness on a “case-by-case” basis, considering the “totality
of the circumstances.” Id. In the Data Roaming Order, the Commission set
forth a non-exhaustive list of factors it may consider in making this
determination. Id. at 5452-53.
      CMDS providers’ ability to individually negotiate under the Data
Roaming Order creates a critical distinction between that order and the
Automatic    Roaming     Order.    Under    the   Automatic     Roaming     Order,
discrimination in terms is not permissible; under the Data Roaming Order, it
is. See Cellco P’ship, 700 F.3d at 548. This is because the Commission did not
intend to subject CMDS providers to what are known as common carriage
obligations (discussed below). See id. at 545. Indeed, the D.C. Circuit upheld
the Data Roaming Order on the basis that it did not subject CMDS providers
to common carriage obligations, as this would have likely exceeded the
Commission’s authority under the Act. See id. at 545.
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      The Commission promulgated the Automatic Roaming and Data
Roaming Rules under Titles II and III of the Communications Act, respectively.
Title II of the Act grants the Commission power to regulate “common carrier
services.” Title III grants the commission power to regulate radio
communications. Common carrier services regulated under Title II must be
furnished “upon reasonable request,” 47 U.S.C. § 201(a), on “just and
reasonable”    terms,   §   201(b),   and    without   “unjust   or   unreasonable
discrimination in charges, practices, classifications, regulations, facilities, or
services.” § 202(a).
      Although Title II’s definition of “common carrier” is circular, see id.
§ 153(11) (defining “common carrier” as “any person engaged as a common
carrier for hire”), Title III clarifies which mobile services should be treated as
a common carriage and which should not. Section 332(c)(1)(A) directs the
Commission to treat anyone providing “commercial mobile service,” insofar as
it is providing that service, as a common carrier, excepting such classes as the
Commission may prescribe. In turn, § 332(d)(1) defines “commercial mobile
service” as “any mobile service . . . that is provided for profit and makes
interconnected service available (A) to the public or (B) to such classes of
eligible users as to be effectively available to a substantial portion of the public,
as specified by regulation by the commission,” and § 332(d)(2) defines
“interconnected services” as a “service that is interconnected with the public
switched network (as such terms are defined by regulation by the commission)
or service for which a request for interconnection is pending.” Any mobile
service that is not a commercial mobile service or its functional equivalent is
designated a “private mobile service.” Id. § 332(d)(3). Insofar as a person is
providing private mobile service, it may not be treated as a common carrier.
Id. § 332(c)(2). Thus, if a service is not interconnected with the public switched


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                                    No. 17-60736
network, it is a private mobile service and therefore not subject to common
carriage obligations.
        To recap, the resulting regulatory regime divides the world of roaming—
for our purposes, at least—into CMRS and CMDS. CMRS includes
interconnected voice or data services, as well as text and push-to-talk. 1
Providers of CMRS services are subject to common carrier obligations and are
not allowed to discriminate in the terms they offer. CMDS includes all for-
profit, publicly-available, noninterconnected data services. Providers of CMDS
services are required only to provide roaming agreements on commercially
reasonable terms; they can discriminate in the terms they offer.
                                          B.
        Worldcall Interconnect, Inc. (“WCX”), is a mobile services provider
licensed to operate in the primarily rural triangle between Houston, Austin,
and San Antonio. When WCX’s users travel outside of that triangle, they
cannot access WCX’s network using WCX’s infrastructure alone. As a result,
WCX had to seek out another mobile services provider, or providers, with a
broader network that WCX users could use while outside of WCX’s service
area.
        In 2011, WCX approached AT&T seeking a data roaming agreement. In
order to understand the terms of the agreement, some explanation of the
mechanics of roaming on the particular AT&T network at issue here is
necessary. When a WCX subscriber uses AT&T’s network, the AT&T core
network verifies that the subscriber is authorized to roam on the network and
then forwards the data transmission to WCX’s network for further routing. The



        1We acknowledge that push-to-talk and text are not included in the regulatory
definition of CMRS. However, because the Automatic Roaming Order subjects those services
to the same requirements as CMRS (namely, Title II common carrier requirements), we will
use CMRS as a blanket term for all three services for ease of reading.
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                                   No. 17-60736
parties agree that the AT&T infrastructure that would be used by WCX
subscribers for roaming is not interconnected. The WCX network that the
subscriber will be forwarded to, however, offers both interconnected and
noninterconnected services. Once on WCX’s network, the subscriber can
browse the internet (noninterconnected), originate and terminate calls
(interconnected), and send texts (interconnected). When a subscriber is
roaming, the AT&T network cannot distinguish between the various services
the subscriber may be utilizing.
      After several months of unsuccessful negotiations, the parties went to
the Commission seeking assistance in reaching a compromise. After another
few months, WCX sought to file a complaint on the Commission’s accelerated
docket but was denied.
      The parties resumed negotiations in 2014, but these negotiations also
stalled. In September 2014, WCX filed its initial complaint with the
Commission.     The   complaint     alleged   several       violations   of   federal
communications law and Commission regulations. Relevant here, WCX alleged
that AT&T’s proposed rates were unreasonably discriminatory, seeking
application of the Automatic Roaming Rule to its dispute. Alternatively, WCX
alleged that the rates were commercially unreasonable under the Data
Roaming Rule.
      After WCX filed its complaint, the Enforcement Bureau staff directed
WCX and AT&T to exchange their best and final offers. When the parties failed
to resolve their dispute, the Bureau issued an interim order denying WCX’s
complaint. In doing so, the Bureau determined that the Data Roaming Rule
would apply to the dispute and found that AT&T’s proposed rates were not
commercially unreasonable. After the interim order was issued, AT&T and
WCX executed a roaming agreement that “resolve[d] the remaining issues
consistent with the Interim Order.” The parties entered this agreement with
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                                No. 17-60736
the understanding that WCX would challenge the order on a motion for
reconsideration with the Commission. The Bureau adopted the interim order,
and WCX sought review from the full Commission.
      The Commission denied WCX’s petition for review. Agreeing with the
Bureau, the Commission determined that § 20.12(e) (the Data Roaming Rule),
and not § 20.12(d) (the Automatic Roaming Rule), should apply to the dispute
before it. The Commission held that, as between the two provisions, which
provision applies depends on the type of service the host carrier will be
supplying in the given transaction. When the host carrier supplies only
noninterconnected data services, the Data Roaming Rule applies; when the
host carrier supplies interconnected voice, push-to-talk, or text services, the
Automatic Roaming Rule applies. The Commission then made the finding that
WCX requested use of “AT&T’s mobile broadband internet access service.”
Because MBIAS is a noninterconnected data service, the Commission
determined that the Data Roaming Rule applied.
      Applying the Data Roaming Rule, the Commission found that WCX had
failed to demonstrate that AT&T’s proposed rates were commercially
unreasonable. The Commission based this conclusion on a review of AT&T’s
other data roaming agreements, which contained rates that were comparable
to, and in some cases higher than, those offered to WCX. It also affirmed the
Bureau’s decision not to accord significant weight to pieces of evidence
proffered by WCX, including AT&T’s strategic agreements and WCX’s roaming
agreement with another provider, finding they were not useful proxies for the
commercial reasonableness of AT&T’s data roaming rates. The Commission
therefore denied WCX’s application for review. WCX now petitions this court
for review. AT&T joins in this appeal as an intervenor.




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                                       II.
                                       A.
      We review agency action under the Administrative Procedure Act’s
arbitrary and capricious standard. See 5 U.S.C. § 706(2)(A). Arbitrary and
capricious review asks “whether [the] agency articulated a rational connection
between the facts found and the decision made.” ExxonMobil Pipeline Co. v.
U.S. Dep’t of Transp., 867 F.3d 564, 571 (5th Cir. 2017) (quoting Pension
Benefit Guar. Corp. v. Wilson N. Jones Mem’l Hosp., 374 F.3d 362, 366 (5th Cir.
2004)). Under this standard of review, the Commission’s factual findings must
be supported by “substantial evidence.” § 706(2)(E); 47 U.S.C. § 402(g).
Substantial   evidence   involves   “more    than   a   scintilla,   less   than   a
preponderance, and is such relevant evidence as a reasonable mind might
accept as adequate to support a conclusion.” Elgin Nursing & Rehab. Ctr. v.
U.S. Dep’t of Health & Human Servs., 718 F.3d 488, 495 (5th Cir. 2013)
(quoting Hames v. Heckler, 707 F.2d 162, 164 (5th Cir. 1983)). On questions of
law, we accord deference to an agency’s interpretation of its own ambiguous
regulation. See Tex. Clinical Labs v. Sebelius, 612 F.3d 771, 777 (5th Cir. 2010)
(“Generally, an agency’s interpretation of its own ambiguous regulation is
‘controlling’ unless ‘plainly erroneous or inconsistent with the regulation.’”
(quoting Auer v. Robbins, 519 U.S. 452, 461 (2010))). This deference is “even
greater” than the deference agencies receive under Chevron, U.S.A., Inc v. Nat.
Res. Def. Council, Inc., 467 U.S. 837 (1984), when interpreting statutes they
are tasked with enforcing. Elgin Nursing, 718 F.3d at 493.
                                       B.
      WCX contends that the Automatic Roaming Rule should apply to this
dispute. It first argues that (1) the Commission erred in finding that WCX had
requested “Mobile Broadband Internet Access Service” (“MBIAS”), rather than
a roaming agreement, and (2) the Commission reached the conclusion that the
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Data Roaming Rule should apply on the basis of that erroneous factual finding.
According to WCX, it simply requested a “roaming agreement,” not MBIAS. In
response, the Commission and AT&T argue that the Commission’s finding was
proper, pointing out that WCX alleged a violation of § 20.12(e) in its initial
complaint and conceded that the rule applies to MBIAS.
      Not one of the three parties to this dispute marshals sufficient record
evidence on this point. Despite WCX’s allegation that it sought only a roaming
agreement, it does not cite to the terms of its best and final offer, nor the terms
of any other potential agreement between it or AT&T, as evidence of its seeking
a “roaming agreement.” On the other side, the Commission and AT&T try to
establish that WCX sought MBIAS based on WCX’s own representations in the
course of this proceeding. These representations fall far short of substantiating
the Commission’s finding that “WCX requests only a mobile broadband
Internet access service from AT&T.” True, WCX did allege a violation of
§ 20.12(e), but it also alleged a violation of § 20.12(d), and has consistently
maintained that it has sought both automatic and data roaming for its
customers. It may well be the case that the service sought by WCX was in fact
only MBIAS, but WCX’s admissions alone will not establish that.
      We need not wade into this inadequately briefed factual quibble,
however. We may assume without deciding that the Commission erred in its
determination that WCX requested MBIAS. Such a finding alone does not
warrant vacatur unless the alleged error was prejudicial. In conducting
arbitrary and capricious review, the APA requires that courts take “due
account . . . of the rule of prejudicial error.” § 706. Under this doctrine, also
referred to as harmless error, we will not reverse an agency action due to a
mistake where that mistake “clearly had no bearing on the procedure used or
the substance of decision reached.” Sierra Club v. U.S. Fish & Wildlife Serv.,
245 F.3d 434, 444 (5th Cir. 2001) (quoting U.S. Steel Corp. v. EPA, 595 F.2d
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207, 215 (5th Cir. 1979)). 2 This inquiry is informed by several factors. See City
of Arlington v. FCC, 668 F.3d 229, 244 (5th Cir. 2012) (citing Shinseki v.
Sanders, 556 U.S. 396, 411-12 (2009)). The only such factor relevant here is
“an estimation of the likelihood that the result would have been different.” Id.
(quoting Shinseki, 556 U.S. at 411). 3
       Appearing to anticipate this requirement, WCX avers in its reply brief
that the Commission’s allegedly erroneous finding “was the foundation for [its]
legal conclusion that only Rule 20.12(e) applies.” We are not so sure. While
WCX is correct that the Commission referenced WCX’s requesting MBIAS
“four times,” the references appear unimportant when viewed in context. As
discussed, the Commission reached its conclusion that § 20.12(e) applied by
interpreting § 20.12(d) to only apply insofar as the host carrier was engaged in
the provision of CMRS. “These, and these alone,” the Commission wrote, “are
the ‘services covered by’ Section 20.12(d).” To be sure, this sentence is followed
by the controverted “WCX requests only a mobile broadband Internet access
service from AT&T.” However, in light of the preceding statement, the
references to MBIAS would only have prejudicial significance if there were any
possibility that the Commission might have otherwise found that AT&T was
providing, or that WCX had requested, interconnected services supplied by
AT&T. This is because the interpretation adopted in the Order on Review
makes the applicable rule turn on what service is being supplied by the host
provider, in this case AT&T. WCX has conceded that AT&T did not offer it
interconnected services (i.e., CMRS). Accordingly, it would have made no



       2 This language dates back to the Supreme Court’s decision in Massachusetts Trustees
of Eastern Gas and Fuel Associates v. United States, 377 U.S. 235, 248 (1964).
       3 The other suggested factors are an awareness of what body has the authority to reach

the challenged result, the error’s likely effects on the perceived integrity of judicial
proceedings, and a hesitancy to generalize about particular errors where the specific facts
surrounding the error may make all the difference. Id.
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difference whether the Commission had found that WCX had requested
MBIAS, roaming access, or any other noninterconnected service; so long as it
did not find that AT&T-supplied interconnection was involved, it had a valid
basis for concluding that § 20.12(d) did not apply. 4 It follows from this that
§ 20.12(e) would apply; the parties do not dispute that WCX sought a “data
service” of some variety, 5 and the bifurcated nature of the Commission
definitions subjects publicly-available for-profit data services to § 20.12(e)
insofar as they are not interconnected. See § 20.12(e). 6 We therefore conclude
that any alleged error that the Commission may have made in stating that
WCX requested MBIAS was harmless and therefore does not warrant vacatur.
                                             C.
       We turn next to WCX’s proposed interpretation of § 20.12. According to
WCX, § 20.12(d), the Automatic Roaming Rule, should apply to this dispute.
To this end, WCX proffers what it calls a “who-what” interpretation of the rule.
Under this interpretation, §§ 20.12(a)(2) and (a)(3) supply the “who”— namely
the parties that are subject to the automatic and data roaming obligations,
respectively—and §§ 20.12(d) and (e) supply the “what”—i.e., the requirements
imposed on those parties. Under this interpretation, AT&T is a § 20.12(a)(2)
“who” because it supplies interconnected services to its retail customers, and
it is therefore subject to the § 20.12(d) “what,” namely the obligation to provide


       4  Of course, this does not address the question of whether the Commission’s
interpretation of § 20.12 was correct, which we discuss below.
        5 At every stage of this litigation, AT&T and WCX have agreed that any agreement

would involve the use of AT&T’s LTE network. The agreement sought was also characterized
before the Commission as a “data roaming agreement.” As discussed above, WCX also admits
that AT&T will not supply interconnection.
        6 WCX does dispute, however, whether AT&T’s services fall within the definition of

CMDS, because they are not “available to the public.” This contention is meritless. Roaming,
by its nature, involves a home provider’s subscriber using the host provider’s infrastructure
for wireless services. See Cellco P’ship, 700 F.3d at 537. When AT&T offers data roaming to
WCX, it is offering data services to the public. AT&T’s noninterconnected data services
therefore meet the regulatory definition of CMDS.
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                                  No. 17-60736
automatic roaming upon reasonable request. Because WCX contends it
requested automatic roaming in this case, it insists the Automatic Roaming
Rule applies.
      The Commission first argues that this argument is not properly before
us. According to the Commission, WCX raises its “who-what” interpretation of
§ 20.12 for the first time on appeal. Because the Commission has not had the
opportunity to consider it, the Commission contends, this court may not be the
first to pass on its merits.
      WCX offers a retort in a brief footnote in its reply brief. Responding not
only to this waiver argument, but to the Commission’s other waiver arguments
(made in its commercial reasonableness section, discussed below), WCX
contends that “these assertions rest on mischaracterizations of WCX’s
arguments or ignore that WCX’s Brief is merely ‘the same basic argument in a
more polished and imaginative form.’” Pet’r Reply Br. 8 n.2 (quoting Sw. Bell
Tel. Co. v. FCC, 100 F.3d 1004, 1007-08 (D.C. Cir. 1996)).
      The Communications Act provides that the filing of a petition for
reconsideration is a condition precedent to judicial review where the party
seeking review “relies on questions of fact or law upon which the Commission
. . . has been afforded no opportunity to pass.” 47 U.S.C. § 405(a). This does not
“require an argument to be brought up with specificity, but only reasonably
‘flagged’ for the agency’s consideration.” NTCH, Inc. v. FCC, 841 F.3d 497, 508
(D.C. Cir. 2016) (quoting Time Warner Entm’t Co. v. FCC, 144 F.3d 75, 81 (D.C.
Cir. 1998)). The central question is “whether a reasonable Commission
necessarily would have seen the question raised before us as part of the case
presented to it.” Id. (quoting Time Warner, 144 F.3d at 81).
      In order to determine whether WCX raises this argument for the first
time on appeal, we must determine precisely what argument WCX raises on
appeal and what argument WCX raised before the Commission. Before the
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Commission, WCX appears to have argued that because its subscribers utilize
its interconnected network to make calls while roaming on AT&T’s network,
§ 20.12(d) should apply. Here, as discussed, WCX appears to emphasize not
what its subscribers do, but what AT&T does, to bolster its conclusion that
§ 20.12(d) applies.
      We find that WCX adequately preserved this argument before the
Commission. Although WCX did not raise its “who-what” argument with
specificity, the record below contains references to this general line of
argument. WCX stated in its application for review that “AT&T offers
interconnected voice and data service to its own customers, so it is subject to
20.12(d).” It also made a similar point in its reply brief before the Commission.
While there may not be exact congruity between the two arguments, this was
sufficient to “tee[] up” the issue before the Commission, Time Warner, 144 F.3d
at 81, such that it was aware that the issue of the proper interpretation of
§ 20.12 was before it. See Fibertower Spectrum Holdings, LLC v. FCC, 782 F.3d
692, 697 (D.C. Cir. 2015) (finding waiver where petitioner “has not pointed to
record evidence that the Commission realized [petitioner’s argument] was
before it”). Moreover, the Commission had an opportunity to pass on the precise
legal question raised by WCX—the proper interpretation of § 20.12—there and
on appeal. Accordingly, WCX’s § 20.12 arguments have not been waived.
      We turn now to the merits of WCX’s § 20.12 argument. When an agency
interprets its own ambiguous regulation, we apply Auer deference, striking
down only agency interpretations that are “plainly erroneous or inconsistent
with the regulation.” Auer, 519 U.S. at 461 (quoting Robertson v. Methow
Valley Citizens Council, 490 U.S. 332, 359 (1989)). WCX contends that the text
of § 20.12 is “clear and unambiguous and cannot yield to the Commission’s
reading” and therefore does not warrant Auer deference. It also contends that


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in any event the reading does not sensibly conform to the regulation’s purpose
and wording, and therefore fails even under the deferential Auer standard.
      A review of the text of § 20.12 leads to the conclusion that the regulation
is, at the very least, ambiguous. Subsection (a)(2) (the “who” section of the
regulation, according to WCX) provides that automatic roaming obligations
apply to “CMRS carriers if such carriers offer real-time, two-way switched
voice or data service that is interconnected with the public switched network
and utilizes an in-network switching facility that enables the carrier to re-use
frequencies and accomplish seamless hand-offs of subscriber calls” as well as
“the provision of push-to-talk and text-messaging service by CMRS carriers.”
Even assuming that this section provides the “who,” and section (d) provides
the “what,” neither section expressly provides the “when.” Consider the word
“offer” under (a)(2). The regulation does not specify whether the Automatic
Roaming Rule applies when the host provider “offers” interconnected services
to its retail customers, or only when it “offers” such services to roaming
customers. Nor does the language of section (d) fill this gap in the regulatory
scheme. It can therefore scarcely be said that the text is “clear and
unambiguous.” Accordingly, Auer deference applies.
      Mindful of our deferential standard of review, we conclude the
Commission’s interpretation—that it is the service being supplied by the host
carrier, rather than the home carrier, that determines whether the Automatic
Roaming Rule applies—is permissible. This interpretation finds support in the
text of the Federal Communications Act, as well as the discussion from both
Roaming Orders. First, the statutory provision that imposes common carrier
obligations on providers of mobile services states that
      a person engaged in the provision of a service that is a commercial
      mobile service shall, insofar as such person is so engaged, be
      treated as a common carrier for purposes of this chapter, except for

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                                  No. 17-60736
      such provisions of subchapter II as the Commission may specify by
      regulation as inapplicable to that service or person.

47 U.S.C. § 332(c)(1)(A) (emphasis added). The discussion section of the
Automatic Roaming Order makes this point even more saliently: “Like any
other common carrier service offering, if a CMRS provider offers automatic
roaming, it triggers its common carrier obligations with respect to the
provisioning of that service.” Automatic Roaming Order, 22 FCC Rcd. at 15827-
28 (emphasis added). Third, the Data Roaming Order contains language that
would seem to bolster the Commission’s interpretation, or at the very least
foreclose WCX’s:
      Under our decision today, as long as a provider provides mobile
      data services that are for profit and available to the public or to
      such classes of eligible users as to be effectively available to the
      public, it will be covered by the rule adopted herein regardless of
      whether the provider also provides any CMRS and without regard
      to the mobile technology it is utilizing to provide services.

Data Roaming Order, 26 FCC Rcd. at 5432 (emphasis added). These sources
more than justify the Commission’s conclusion that AT&T is only subject to
automatic roaming obligations when it is supplying CMRS.
      The balance of the parties’ briefing concerns the potential consequences
that will follow from the adoption of one another’s respective interpretations.
But we see no need to delve into those matters, given our highly-limited scope
of review. The foregoing is sufficient to establish that the regulation was at the
very least ambiguous and that the Commission’s interpretation was not
“plainly erroneous or inconsistent with” § 20.12. With Auer in mind, our
inquiry into the meaning of § 20.12 is at its end.
      The question that remains is whether AT&T is providing CMRS or
CMDS in this case. As discussed, the parties agree that AT&T is not supplying
interconnection. Accordingly, the service it provides does not fall within the

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                                 No. 17-60736
definition of CMRS, and the Automatic Roaming Rule does not apply. On the
other side of the coin, there is ample evidence that the service at issue here is
CMDS. First, parties agree that WCX approached AT&T seeking a data
roaming agreement. Second, the roaming rates proposed by both parties
related to measurements used to price data usage. Additionally, the timing of
the agreement is evidence of its character. In their joint statement before the
Bureau, the parties acknowledged that WCX sought a “data roaming
agreement” “shortly after the Data Roaming Order was released.” The
foregoing makes clear that WCX sought and AT&T offered to provide AT&T-
supplied CMDS. The Commission therefore did not act arbitrarily or
capriciously in concluding that the Data Roaming Rule applies to this dispute.
                                       D.
      Because we affirm the Commission’s application of the Data Roaming
Rule, we must now determine whether the Commission's determination of the
commercial reasonableness of the rates was in error under the highly
deferential standard of review discussed above. WCX argues that, even if the
Data Roaming Rule applies, the Commission erred in finding that AT&T’s
rates were commercially reasonable. The Data Roaming Rule requires CMDS
providers to enter into data roaming agreements on commercially reasonable
terms. § 20.12(e). The Commission assesses commercial reasonableness on a
case-by-case basis based on the totality of the circumstances. See § 20.12(e)(2).
The Data Roaming Order also provides a non-exhaustive list of factors the
Commission may consider in making its determination. Data Roaming Order,
26 FCC Rcd. at 5452-53. These factors include, inter alia:
      [W]hether the terms and conditions offered by the host provider
      are so unreasonable as to be tantamount to a refusal to offer a data
      roaming arrangement . . . the level of competitive harm in a given
      market and the benefits to consumers . . . the impact of the terms
      and conditions on the incentives for either provider to invest in

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                                  No. 17-60736
        facilities and coverage, services, and service quality . . . [and]
        whether there are other options for securing a data roaming
        arrangement in the areas subject to negotiations and whether
        alternative data roaming partners are available.

Id. We review the subsidiary factual findings made in the Commission’s
commercial reasonableness determination for substantial evidence under the
APA’s arbitrary and capricious standard. 5 U.S.C. § 706(2)(E); 47 U.S.C. §
402(g).
        WCX first contends that the Commission erred by failing to take into
account WCX’s individual ability to compete. In particular, WCX emphasizes
that AT&T’s proposed rates are in excess of what WCX can charge its retail
customers under Texas law. As a result, if WCX accepts AT&T’s rates, it will
have to either restrict users’ access to roaming or operate at a considerable
loss.
        The Commission contends that this argument is not properly before the
court. As discussed above, the filing of a petition for reconsideration is a
condition precedent to judicial review where the petitioner seeks to raise a new
question of fact or law. 47 U.S.C. § 405(a). Additionally, “raising an issue before
a designated authority is not enough to preserve it for review before [the]
Court; a party must raise the issue before the Commission as a whole.”
Environmentel, LLC v. FCC, 661 F.3d 80, 84 (D.C. Cir. 2011). The Commission
argues that WCX’s petition below failed to charge the Bureau with failing to
consider WCX’s individual ability to compete. While WCX did raise a version
of this argument in its briefing before the Bureau, the Bureau rejected the
argument in a footnote, and WCX did not raise it in its petition before the
Commission.
        We find that WCX failed to preserve this argument. Although WCX
alludes to its individual ability to compete at various points in its petition for

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                                 No. 17-60736
review and reply below, it did so only in the context of arguing that the Bureau
erred by “holding that WCX failed to demonstrate that AT&T’s proposed rates
substantially exceed retail rates.” A review of the record confirms that WCX’s
assertion of competitive harm was a gloss on its argument that AT&T’s
proposed fees were severely in excess of its retail rates; not a concern to be
considered by the Commission in and of itself. We also note the lack of any
reference to the Texas retail caps in WCX’s petition for review before the
Commission. Given the caps’ centrality to WCX’s argument on appeal, the
Commission deserved an opportunity to consider this constraint, especially if—
as WCX contends—the question of WCX’s individual ability to compete were
before it. As a result, we cannot say that the Commission had an opportunity
to pass on WCX’s argument that its individual ability to compete should be
considered. This argument is therefore not properly before us, and we cannot
consider it.
      WCX next argues that the Commission erred by failing to consider its
roaming agreement with another wireless provider as evidence of the
commercial unreasonableness of AT&T’s rates. To support its argument, WCX
points to the Data Roaming Order’s admonition that the Commission should
consider “alternative data roaming partners” in making its determination of
commercial reasonableness. Data Roaming Order, 26 FCC Rcd. at 5453.
      In its interim order, the Bureau refused to give the partner’s rates
significant weight. It reached this conclusion on the grounds that (1) the Data
Roaming Order contemplates that providers may “negotiate terms and
conditions on an individualized basis, including prices, with different parties”
and (2) WCX’s admission that AT&T’s network coverage was superior to its
alternative partner. The Commission did not discuss this claim on review but
instead adopted the Bureau’s order.


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                                No. 17-60736
      WCX takes issue with the second basis for the Bureau’s conclusion.
Although it is true that AT&T offers a superior product, WCX argues that this
cannot function as a justification for higher prices. According to WCX, it was
the superiority of AT&T’s network coverage, along with its attendant
unwillingness to enter into reasonable data roaming agreements, that created
the necessity for a Data Roaming Order. If the mere fact that AT&T has a more
extensive network than most other potential roaming partners is sufficient to
sustain a finding of commercial reasonableness, then, WCX contends, there
will be little difference between the state of play prior to and after the Data
Roaming Order was issued.
      In response, the Commission argues that there is nothing unreasonable
about charging more for a superior product. In the Commission’s view, this
outcome is consistent with one of the Data Roaming Order’s other purposes,
which is to “accommodate a variety of terms and conditions” and “allow[] host
providers to control the terms and conditions of proffered data roaming
arrangements, within a general requirement of commercial reasonableness.”
Data Roaming Order, FCC Rcd. at 5429, 5451.
      We cannot say that the Bureau and Commission acted arbitrarily and
capriciously in reaching this conclusion. WCX is correct that AT&T’s
unwillingness to enter data roaming agreements was part of the mischief that
prompted the Commission’s promulgation of the Data Roaming Order. See id.
at 5424. However, the Data Roaming Order tasks the Commission with
balancing competing interests in assessing commercial reasonableness. On one
side, the Commission must ensure smaller providers’ ability to enter into
roaming agreements with the larger providers. See id. On the other, it must
allow the providers to negotiate individualized terms for those agreements. Id.
This is reflected not just in the Data Roaming Order’s discussion, but in the
broad leeway the resulting regulation accords the Commission to conduct the
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                                 No. 17-60736
commercial reasonableness inquiry. See § 20.12(e)(2) (requiring case-by-case
analysis based on a totality of the circumstances). Weighing these interests,
the Bureau (and the Commission, by adopting its order) determined that the
commercial reasonableness standard did not compel it to tie AT&T’s rates to
those of a company that offered an inferior product.
      WCX next argues that, by excluding its proffered evidence, the
Commission based its determination exclusively on the data roaming rates
offered by AT&T to other customers. This scope, WCX contends, effectively
defines the relevant market to include AT&T alone. Under this arrangement,
WCX and other small providers have no real choice but to “accept AT&T’s
adhesion offer.” Similar to its previous argument, WCX argues that this
contravenes the Data Roaming Order’s purpose of promoting competition in
the market.
      We find that the Bureau’s analysis did not define the relevant market to
include only AT&T. The Bureau did consider the other rates, but simply found
that they do not, of their own weight, call into question the commercial
reasonableness of AT&T’s proposed rates. Refusing to give substantial weight
to the evidence of alternative rates is not the same as excluding the evidence
altogether. Moreover, while it may be true, as WCX contends, that the current
market forces WCX to choose between a more expensive product and an
inferior product, this does not mean that it has been left with no choice at all.
If WCX wishes, it can offer its customers a network with a smaller coverage
area for lower prices. Although that may strike WCX as inconsistent with the
purposes of the Data Roaming Order, those are matters best addressed by the
Commission. As we have already said, the Order tasks the Commission with
weighing competing goals, and our review of the agency’s interpretation of the
Order is heavily cabined.


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                                     No. 17-60736
      WCX also objects to the weight accorded to AT&T’s other roaming
agreements as evidence of the commercial reasonableness of AT&T’s proposed
rates. According to WCX, the providers who accepted the prices cited to were
“loudly advising the Commission” that they had accepted these prices under
duress and that they had to exit the market because of the prices they had
accepted. The upshot of WCX’s argument appears to be that, while many of
these prices were higher than the price offered to WCX, they too are
commercially     unreasonable      and    are   therefore    not    probative    of   the
reasonableness of AT&T’s proposed rates.
      We find that WCX did not raise this argument in its petition for review.
While WCX did attack consideration of these rates in its petition for review
below, it did so on the grounds that the rates considered were AT&T’s oldest
and most expensive agreements. 7 Nowhere in its petition for review did WCX
contend that those rates were accepted under duress. Therefore, this argument
is not properly before this court.
      Viewing the Commission’s consideration of the evidence as a whole, WCX
contends that the Commission created an irrebuttable presumption in favor of
the commercial reasonableness of AT&T’s proposed rates and that it therefore
ran afoul of § 20.12(e)(2)’s requirement that it consider reasonableness on a
“case-by-case basis, taking into consideration the totality of the circumstances
presented in each case.” As a result, WCX contends, the interpretation of the
commercial reasonableness standard does not deserve Auer deference.
      We disagree. As discussed above, the record makes clear that the
Commission considered both AT&T’s and WCX’s proffered evidence, balanced
the competing interests embodied by the Data Roaming Order, and reached a


      7   WCX does not brief its argument that the rates provided by AT&T were its oldest
and most expensive. Accordingly, we treat that argument as waived on appeal. See In re Age
Ref., Inc., 801 F.3d 530, 539 & n.23 (5th Cir. 2015); see also Fed. R. App. P. 28(a)(8).
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                                   No. 17-60736
reasoned conclusion. That it found AT&T’s proposed evidence more probative
of commercial reasonableness than WCX’s did not create an irrebuttable
presumption.
         Finally, turning to the full weight of the evidence presented before the
Commission and properly before this court, we cannot say that the
Commission’s decision was not supported by substantial evidence. The
evidence of AT&T’s other data roaming rates constituted evidence that “a
reasonable mind might accept as adequate” to justify the Commission’s
conclusion that AT&T’s proposed rates were commercially reasonable. Elgin
Nursing, 718 F.3d at 495 (quoting Hames, 707 F.2d at 164). The Commission’s
determination that AT&T’s proposed rates were commercially reasonable was
therefore not arbitrary and capricious.
         Accordingly, we DENY WCX’s petition for review of the Commission’s
order.




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                                 No. 17-60736


JENNIFER WALKER ELROD, Circuit Judge, concurring in the judgment:
      I concur in the judgment.      The Data Roaming Rule applies to this
agreement.    I write separately to reach this conclusion not through the
labyrinth of Auer deference, but through the straightforward application of the
regulation’s text. We defer to an agency’s interpretation of its own regulation
only when the regulation is “ambiguous.” Tex. Clinical Labs v. Sebelius, 612
F.3d 771, 777 (5th Cir. 2010) (citing Auer v. Robbins, 519 U.S. 452, 461 (1997)).
But the regulation at issue here is not. The Automatic Roaming Rule imposes
duties only on a “host carrier subject to [subsection] (a)(2).”        47 C.F.R.
§ 20.12(d). To fall within the scope of subsection (a)(2), the host must be a
“CMRS carrier[]” that “offer[s] real-time, two-way switched voice or data
service that is interconnected with the public switched network.”             Id.
§ 20.12(a)(2). By definition, CMDS, the service that AT&T offered to WCX, is
“not interconnected with the public switched network.” Id. § 20.3. When, as
here, a carrier provides commercial mobile data services to a customer, it is
(unsurprisingly) a “provider[] of commercial mobile data services.”           Id.
§ 20.12(a)(3). That means that the Data Roaming Rule applies. Id.
      Moreover, “[w]hen presented with two plausible readings of a regulatory
text,” we “prefer[] the reading that does not render portions of that text
superfluous.” Exelon Wind 1, LLC v. Nelson, 766 F.3d 380, 399 (5th Cir. 2014).
WCX’s interpretation would render the Data Roaming Rule superfluous. If a
provider of CMDS became subject to the CMRS roaming rule simply by
providing CMRS service to the public, there would be no reason for a separate
Data Roaming Rule for such carriers. WCX does not identify any data roaming
request that it or another wireless provider could make to AT&T or another
host that would be subject to the data roaming rule.


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