“T-Mobile will never change the price you pay for your T-Mobile ONE plan.” That was the promise, and a lot of customers signed up because of it. Now the carrier is retiring its oldest plans and moving those customers onto newer ones that cost more.
T-Mobile has confirmed the migration. Android Central reports that it covers customers on Simple Choice, ONE and ONE Plus, Magenta and grandfathered Sprint plans. Gadget Review adds that Go5G and data-only accounts are not affected, and that billing changes for the current wave begin in mid-July. Emails and messages have already gone out to some customers.
What the carrier says
In a statement, T-Mobile said some of these plans were built more than 15 years ago, in the 3G and 4G era. Customers “will move to modern plans with access to better wireless technology, enhanced features, and a 5-year price guarantee,” the company said. Some will see no change to their bill, it said, and others a modest adjustment. Everyone keeps their existing benefits.
The increase can reach $6 per line per month, according to Android Central. CNET puts the average at $4 per line. The new plans fall under a category called Experience, with tiers named Signature, Select, More and Beyond. A Reddit post describes benefits such as unlimited premium data with hotspot sharing and ad-free Netflix on most tiers. Gadget Review lists satellite text connectivity, 250 GB of high-speed hotspot data and Hulu, among other extras.
The fine print
The five-year guarantee covers base talk, text and data charges only. Fees and taxes sit outside it. Gadget Review notes that T-Mobile’s administrative fee for voice lines rose from $3.99 to $4.49 a month, its second increase within a year, according to tmo.report. The fee for mobile internet lines went from $1.60 to $2.10.
For some customers the new rise stacks on an earlier one. A $5-per-line increase hit many legacy smartphone plans in April 2025, and PhoneArena reports that some customers on older plans now face total increases approaching 60 percent over their original rates. Opting out is reportedly not possible.
Customer reaction
Many customers have vented on social media and Reddit. Some have filed complaints with state courts over the price lock guarantee, Android Central reports, and a number say they plan to switch to Verizon’s new Simplicity plan. On the r/tmobile forum, some users call the new plans forced upsells. Others say care reps have told frustrated customers to take their complaints to corporate and the CEO.
The timing sits awkwardly with T-Mobile’s own marketing. Variety reports it is running a “15-Minute Switch” program offering up to $800 in device payoffs to lure AT&T customers. AT&T raised prices on retired unlimited plans by $10 to $20 per line starting in April 2026, Gadget Review reports.
Sources
- T-Mobile is killing off old plans and forcing loyal customers onto pricier ones
- T-Mobile Just Ripped 8 Million Customers Off Their Grandfathered Plans – and Raised Their Bills
