T-Mobile scored a 46 on the wireless industry's most-watched customer loyalty metric Thursday, the highest Net Promoter Score ever recorded by any of the three major U.S. carriers, according to HarrisX survey data — and released it alongside a second-quarter earnings report that beat EPS expectations by a wide margin. What the headline number did not show: the company simultaneously warned investors that a planned Q3 customer migration to higher-priced plans would drag new account additions down to roughly 250,000, compared with 277,000 in Q2, as the fallout from forcing approximately 4 million legacy subscribers off grandfathered rate plans plays out in real time. Full results are available in the T-Mobile Q2 2026 8-K filing.

T-Mobile US (NASDAQ: TMUS) reported diluted earnings per share of $2.99 for the second quarter of 2026, 5% higher than a year earlier and well ahead of the Wall Street consensus estimate of approximately $2.59 per share, according to QZ.com. Total service revenue rose 9% year-over-year to $19.0 billion, with postpaid service revenue — the carrier's most closely watched segment — climbing 13% to $15.9 billion. Core Adjusted EBITDA grew 12% to $9.5 billion. Total revenue came in at $22.79 billion, slightly below the analyst consensus of approximately $22.94 billion, with the earnings-per-share beat driven by cost discipline and what the company described as working-capital and tax-efficiency benefits from its AI tooling rollout.

T-Mobile's NPS Record: What the Number Means — and What It Doesn't

The NPS figure of 46 — derived from the HarrisX Mobile Insights Q2 2026 survey, a measurement T-Mobile commissions directly — gives the company its strongest talking point in a decade of Un-carrier positioning. Net Promoter Score, a registered trademark of Bain & Company, measures loyalty on a scale from -100 to +100 by asking customers how likely they are to recommend a service to others; a score above 30 is generally considered strong, and above 50 is considered excellent.

The claim deserves at least one footnote that the press release omits: independent aggregated consumer NPS measurements for T-Mobile show dramatically different results. AltIndex's estimate, drawn from anonymous customer surveys and updated as recently as June 2026, placed T-Mobile at -4. Comparably, another independent aggregator, reported the same figure of -4. The gap between 46 and -4 is not a rounding difference — it reflects the well-documented measurement problem in NPS methodology: a company-commissioned survey of its own customers is structurally different from an opt-in panel of consumers who choose to rate a brand, and the two approaches tend to produce divergent results. T-Mobile's 46 is internally consistent and sourced; it is simply not the same thing as a market-wide customer loyalty figure.

That distinction matters in the same quarter T-Mobile forced a large-scale plan migration. On June 29, 2026, T-Mobile notified customers on older 3G- and 4G-era rate plans — some more than 15 years old — that those plans were being retired effective July 13, 2026, as TechTimes reported. Affected customers were moved to newer 5G-era "Experience" tiers, with phone lines increasing by up to $6 per line per month. The migration affected an estimated 4 million subscribers, some of whom had written documentation of lifetime rate-lock promises from T-Mobile.

T-Mobile described the migration as a modernization, noting that customers gain 5G access and a five-year price guarantee on the new plans — for the rates covered by that guarantee. Critics framed it differently. The FCC notified T-Mobile of an informal customer complaint filed by Alex Gerwer, a 71-year-old subscriber who provided written proof of a lifetime rate-lock promise and sought FCC-supervised mediation. T-Mobile submitted a response to the FCC notification, which observers described as boilerplate language that did not directly address the specific price-lock guarantee at issue. A federal class action has been filed and is pending class certification; judges in at least two jurisdictions have allowed it to proceed. Mass arbitration is also being pursued, which could expose T-Mobile to per-claim filing costs that scale with the number of affected customers.

The practical consumer guidance: T-Mobile customers on legacy plans received notice by July 13, 2026, when the migration began. Those who believe they have a documented price-lock guarantee can file informal complaints through the FCC's consumer complaint portal or their state Attorney General under Unfair, Deceptive, or Abusive Acts and Practices statutes.

Revenue Engine: Premium Plan Upsell and ARPA Growth

Behind the headline numbers, T-Mobile's quarter was driven by higher per-account revenue rather than explosive subscriber growth. Monthly postpaid Average Revenue Per Account (ARPA) rose 2% year-over-year to $152.91, up from $149.87 in the same period of 2025, per the 8-K financial tables. Chief Operating Officer Jon Freier said on the earnings call that roughly 60% of customers on new accounts are selecting the company's most premium plans — a migration away from entry-level tiers that the company has been systematically engineering through its plan architecture.

T-Mobile added 277,000 postpaid net accounts during the quarter, a 13% decline from the 318,000 it added in Q2 2025. Postpaid account churn stood at 0.99%. The company said customers switching to T-Mobile arrived with higher average revenue than those leaving, a spread management described as approximately 20%, though this figure was stated on the earnings call rather than published in the 8-K filing and has not been independently confirmed.

Total postpaid accounts reached 34.7 million at quarter-end, a figure that includes the UScellular customer base, which T-Mobile acquired during the third quarter of 2025.

UScellular Integration and the Rural Growth Thesis

T-Mobile's acquisition of UScellular has become its primary rural-expansion engine. CEO Srini Gopalan, who described Q2 execution as "extraordinary" on the earnings call, pointed to smaller markets and rural areas as representing roughly 40% of the U.S. population while T-Mobile currently holds only about 24% household share in those geographies — a gap the company is presenting as a long runway rather than a structural weakness.

The UScellular integration did add complexity to the quarter's financials. Net income grew just 1% year-over-year to $3.2 billion, weighed down by $146 million in after-tax merger-related costs including accelerated depreciation. The integration required a base adjustment of 16,000 accounts during Q2 after Metronet agreed to repurchase certain customer accounts from T-Mobile.

How SuperBroadband Works — and Why Enterprise Customers Should Care

T-Mobile's most technically ambitious new product, SuperBroadband, launched on April 28, 2026, and the Q2 results provided the first earnings-cycle validation of its enterprise sales progress. The product solves a specific engineering problem: businesses in locations without reliable fiber need redundant connectivity that does not depend on a single provider or network type, as Fierce Network reported at launch.

The architecture works as follows. T-Mobile routes business traffic across two completely independent pathways: its own 5G Fixed Wireless Access network as the primary connection, and SpaceX's Starlink satellite broadband constellation as an automatic backup. Outdoor 5G equipment and routers from Cradlepoint, a subsidiary of Ericsson, combine both connections into a single managed system. Acuative handles on-site installation. The result is that if the 5G connection fails, Starlink takes over without any action from the customer — a redundancy model that until now required assembling separate hardware, separate ISP contracts, and separate support relationships, according to GeekWire's Todd Bishop.

T-Mobile covers 98% of the U.S. population with its 5G network; Starlink satellite connectivity fills the remaining coverage gaps, allowing T-Mobile to claim 100% ZIP code coverage for SuperBroadband, per the official T-Mobile announcement. Plans start at $250 per month plus a $35 device connection charge and require a 36-month commitment; early termination requires payment in full. The product is currently targeted at hospitality, healthcare, retail, and oil-and-gas customers.

The competitive context: AT&T is pursuing business connectivity primarily through fiber, targeting 40 million locations by the end of 2026. Verizon offers business fixed wireless access on a dedicated 5G network slice. T-Mobile's differentiation is the Starlink integration, which neither AT&T nor Verizon currently offers as a bundled managed service.

The Starlink component runs on SpaceX's current V1 satellite generation. The product roadmap becomes significantly more interesting in mid-2027, when SpaceX plans to launch its V2 constellation, which is expected to deliver dramatically higher data density than the current network, according to SpaceX's stated roadmap.

Guidance Raised — With a Q3 Asterisk

CFO Peter Osvaldik raised full-year Adjusted Free Cash Flow guidance to $18.4 billion–$18.8 billion, up from the prior range of $18.1 billion–$18.7 billion — a $200 million increase at the midpoint, per the updated guidance table in the 8-K. He attributed the improvement to better-than-expected cash income-tax efficiencies and working-capital benefits from the company's AI tooling deployment.

Adjusted Free Cash Flow for Q2 came in at $4.8 billion, up 4% year-over-year, on a 25% free cash flow margin. Capital expenditures totaled $2.7 billion, up 13% year-over-year, reflecting network densification and UScellular infrastructure work. For the full year, T-Mobile is targeting service revenue growth of approximately 8% to 9% year-over-year, with postpaid ARPA growth of 2.5% to 3%.

The Q3 caveat: T-Mobile expects postpaid account net additions of approximately 250,000 in Q3 2026, below the Q2 pace, specifically because of a temporary churn spike tied to the rate-plan migration. Osvaldik said the impact on per-phone churn is expected to be modest, since it is concentrated in multi-line accounts with fewer lines. Industry analysts projected no significant longer-term churn damage because T-Mobile's post-increase pricing still sits below AT&T's and Verizon's comparable front-book rates.

T-Mobile returned $3.3 billion to shareholders in Q2, comprising $2.2 billion in share repurchases and $1.1 billion in cash dividends. Cumulative returns since Q3 2022 have reached $54.6 billion.

Network Awards: Speed Leadership, but Verizon Wins Coverage

Four independent network evaluators published findings concurrent with or shortly before the earnings release, and T-Mobile collected top designations from all of them.

Ookla named T-Mobile the Best Mobile Network in its Speedtest Connectivity Report for the United States for the third consecutive time, a result based on median download speeds where T-Mobile reached 275.55 megabits per second (Mbps), according to AndroidAuthority's coverage of the Ookla H1 2026 report. In median 5G download specifically, T-Mobile registered 314.38 Mbps; Verizon ranked second in 5G download at 218.95 Mbps. AT&T's overall median download speed came in at 159.3 Mbps, trailing both rivals on that metric — though AT&T posted the fastest year-over-year improvement of any carrier.

However, Verizon earned Ookla's Best Mobile Coverage designation in H1 2026, leading T-Mobile and AT&T on network geographic availability. Opensignal's July 2026 Mobile Network Experience Report named T-Mobile the most awarded network overall, recognizing it across all Quality of Experience and Network Performance categories while noting that 5G standalone deployment and spectrum depth — not just coverage — are the primary drivers of user experience. Testing firm P3 designated T-Mobile its Q2 2026 Test Champion, awarding it all 13 benchmark categories including an AI Services Champion designation. All awards are noted in the T-Mobile Q2 2026 8-K.

T-Mobile's speed advantage traces primarily to the 2.5 GHz mid-band spectrum it acquired from Sprint in that $26.5 billion merger — a frequency band that provides significantly greater data capacity than the low-band spectrum AT&T and Verizon relied on before their C-band acquisitions, as analyzed in TechTimes' Global 5G Index coverage.

SpaceX as Partner and Possible Rival

Executives were asked on the earnings call about SpaceX's announced ambitions to launch a Starlink-branded direct-to-consumer mobile service in the U.S., having acquired wireless spectrum from EchoStar in a May 2026 FCC-approved transaction. T-Mobile's leadership reiterated its position that satellite connectivity is a complementary technology rather than a competitive threat to its core wireless business in the near term, and pointed to T-Satellite — T-Mobile's existing collaboration with SpaceX that provides supplemental coverage in areas with no terrestrial cell signal — as evidence of the relationship's current character.

The question is not settled. SpaceX, which went public in June 2026 under the ticker SPCX in one of the largest IPOs in financial history, has told investors it is considering a Starlink mobile phone service for U.S. consumers and may eventually build terrestrial cellular infrastructure to support it. All three major carriers have publicly declined to offer SpaceX an MVNO arrangement.

T-Mobile's SuperBroadband roadmap dependency is worth noting: the longer-term value of SuperBroadband's satellite backup is tied to the V2 constellation's performance, and T-Mobile does not control the SpaceX satellite build schedule.

What Happens Next for T-Mobile Subscribers

The most concrete near-term actions for T-Mobile customers flow directly from what was disclosed in Thursday's earnings:

If you are a T-Mobile customer on a legacy 3G- or 4G-era plan, the migration to a new 5G "Experience" tier began July 13, 2026. Check your bill and your T-Mobile account for notification of the specific changes to your plan price. If you received a written price-lock guarantee from T-Mobile — particularly if it is a document predating 2022 — that guarantee may be legally contested by pending litigation. The FCC informal complaint process and state Attorney General UDAP filings remain available options.

If you are evaluating T-Mobile for enterprise broadband connectivity, SuperBroadband's 36-month commitment and early termination penalty are the most important contractual constraints to understand before signing. The dual-path 5G-plus-Starlink architecture is genuinely differentiated from any standalone carrier or ISP offering currently on the market.

If you are an investor in TMUS, the $200 million FCF guidance raise and sustained ARPA growth are tangible evidence of the premium-plan migration strategy working. The Q3 churn impact from rate-plan modernization is management-guided to be temporary, and analyst projections suggest no structural damage to the subscriber base. The longer-term rural expansion thesis — converting a 24% household share in markets representing 40% of the U.S. population — remains a multi-year growth runway the company has only started to address with the UScellular integration.

Frequently Asked Questions

What is T-Mobile's NPS score of 46, and how was it measured?

Net Promoter Score (NPS) is a customer-loyalty metric calculated by asking customers how likely they are to recommend a service to others on a 0–10 scale; the percentage of detractors is subtracted from the percentage of promoters to yield a score from -100 to +100. T-Mobile's Q2 2026 score of 46 was measured by HarrisX through a commissioned survey; T-Mobile describes it as the highest-ever NPS recorded by any of the three major U.S. carriers. Independent consumer aggregators report substantially different figures — AltIndex and Comparably both estimate T-Mobile's NPS at approximately -4, based on opt-in consumer panels. The two methodologies measure different things: a company-commissioned panel of its own customers versus a broader sample of consumers who choose to rate brands. Both are legitimate research methods; they are not directly comparable, and readers should understand which kind of measurement is being described when a carrier makes an NPS claim.

Will my T-Mobile bill go up because of the rate-plan modernization?

It depends on which plan you were on before July 13, 2026. T-Mobile migrated customers on older 3G- and 4G-era plans to newer 5G "Experience" tiers. Some customers will see no change; others face increases of up to $6 per line per month. If you received a written rate-lock guarantee from T-Mobile, that promise is currently being contested in a pending federal class action and through an informal FCC complaint process. Customers with documented price-lock commitments can file informal complaints at the FCC's consumer complaint portal or with their state Attorney General.

What is T-Mobile SuperBroadband, and how is it technically different from regular business internet?

SuperBroadband is a managed enterprise connectivity service that routes business internet traffic simultaneously across two independent networks: T-Mobile's 5G Fixed Wireless Access network as the primary connection and SpaceX's Starlink satellite constellation as an automatic backup. Hardware from Cradlepoint, an Ericsson subsidiary, combines both connections, and T-Mobile handles installation and management through a single contract. The key engineering distinction from standard internet service is built-in redundancy as the default configuration rather than an add-on: if the 5G connection fails, Starlink activates automatically without any user action. Plans start at $250 per month and require a 36-month commitment.

How does T-Mobile's 5G network compare to AT&T and Verizon in speed?

Based on Ookla's H1 2026 Speedtest Connectivity Report, T-Mobile led all three carriers in median download speed with 275.55 Mbps, compared with AT&T's 159.3 Mbps overall median. In median 5G download speed specifically, T-Mobile reached 314.38 Mbps to Verizon's 218.95 Mbps. Verizon earned Ookla's Best Mobile Coverage designation, leading on geographic availability. However, T-Mobile earned the overall Best Mobile Network award for the third consecutive reporting period. T-Mobile's speed advantage is primarily attributable to its 2.5 GHz mid-band spectrum from the Sprint acquisition, which provides higher data capacity than the lower-frequency bands AT&T and Verizon were historically more dependent on.