T-Mobile: bill went up
Check which price promotion covers the account (5-Year Price Guarantee, Price Lock or Un-contract Promise), then raise the change with customer care.
What does this mean?
Grade A (high: almost everything comes from official pages read directly). 99% of 67 sources are the organization's own pages or government sites.
Collect
- last bill before the increase
- first bill after the increase
- plan name and activation date
- the price promotion that applies
Steps
Compare the two bills and find each changed line. Taxes, fees, add-ons and third-party services are outside every T-Mobile price promotion.
Find which promotion applies from the plan and activation date. Call customer service or 611 and ask for the plan price to be restored if the increase breaks the promotion.
If you were on Last Month Price Lock or the Un-contract Promise and T-Mobile raised the plan price, tell T-Mobile within 60 days that you are leaving so it covers your final month's recurring service charges.
If the increase breaks a written promotion, dispute it in writing as a billing error within 60 days.
MailT-Mobile Customer Relations (billing disputes and Notice of Dispute) T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380
More contacts for this issue
Facts you can cite
- Policy
Under the 5-Year Price Guarantee, the monthly price for talk, text and T-Mobile 5G data is guaranteed for 5 years from account activation (or from plan enrollment for accounts activated before April 23, 2025). It excludes taxes/fees, per-use charges, plan add-ons, third-party services and network management practices.
Source: t-mobile.com, verified 2026-10-12
- Policy
Under Last Month Price Lock (eligible plans activated or switched January 18, 2024 to April 22, 2025) and the Un-contract Promise (accounts activated before April 28, 2022), if T-Mobile changes the price and you decide to leave, tell T-Mobile within 60 days and it covers your final month's recurring service charges.
Source: t-mobile.com, verified 2026-10-12
- Policy
T-Mobile gives at least 14 days' notice of a change to Services, Products or Rate Plan terms that has a material adverse effect on you. Surcharges may change without notice regardless of any price-related promotion, subject to that 14-day notice policy.
Source: t-mobile.com, verified 2026-10-12
- Process
Before arbitration or court, you must send a written Notice of Dispute to T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380 with the account holder name, billing account number, mobile number, a description with documents, and a good-faith damages calculation and requested relief. Neither side may start a proceeding until 60 days after receipt.
Source: t-mobile.com, verified 2026-10-12
- Process
Arbitration is administered by the American Arbitration Association under its Consumer Arbitration Rules. To begin, send a letter requesting arbitration to T-Mobile's registered agent (Corporation Service Company) and to the AAA. Either side may choose small claims court for an eligible claim before the arbitrator is appointed.
Source: t-mobile.com, verified 2026-10-12
- Deadline
To the extent the law allows, an arbitration or court proceeding must start within two (2) years of the date the claim arises.
Source: t-mobile.com, verified 2026-10-12
- Policy
T-Mobile completed the acquisition of the UScellular wireless business on August 1, 2025.
Source: sec.gov, verified 2026-10-12
- Policy
T-Mobile acquired 100% of the equity of Ka'ena Corporation and its subsidiaries, including Mint Mobile LLC.
Source: sec.gov, verified 2026-10-12
Rules in force
- FCC broadband consumer labels47 CFR 8.1 (Infrastructure Investment and Jobs Act section 60504); amended by FCC 26-48, 91 FR 52251 (August 13, 2026)
Fixed and mobile broadband providers must show a standard "broadband consumer label" for each plan they sell, at every point of sale (website, stores, phone sales) and in the customer's online account. The label shows the monthly price, introductory rates, fees, data allowance and typical speeds. An August 2026 FCC order will relax some display rules, but most of those changes had not taken effect on 2026-10-12.
Source: ecfr.gov, verified 2026-10-12
4 citable points
- Policy
Each provider of broadband internet access service must create and display a broadband consumer label for each stand-alone plan it currently offers, prominently displayed, publicly available and easily accessible to consumers, in the format the FCC prescribes.
Source: ecfr.gov, verified 2026-10-12
- Policy
The label contains critical information about the plan, including pricing, introductory rates, data allowances and performance metrics. Phone sales representatives must cover the monthly price, typical speeds, latency, data allowance, contract term and early termination fees.
Source: federalregister.gov, verified 2026-10-12
- Deadline
Under the current text, a provider must archive labels for at least two years after a plan stops being sold to new subscribers, and must give an existing customer on that plan the archived label within thirty days of a request. The August 2026 order eliminates the archiving requirement once its amendments to 8.1(a) take effect.
Source: ecfr.gov, verified 2026-10-12
- Policy
The FCC's August 2026 order (FCC 26-48) will let providers summarize the label orally on phone sales, show passthrough fees as a single "up to" amount split into government and third-party charges, use a link or icon instead of the full label at the point of sale and in account portals, and drop the machine-readable spreadsheet and archiving requirements. Its changes to 8.1(a) are delayed until the FCC publishes an effective date; its changes to 8.1(b) took effect September 14, 2026.
Source: federalregister.gov, verified 2026-10-12
- Policy
If that fails, escalate
Go up one step at a time. Keep the reference numbers and dates from each contact.
Customer service
Retention team
The cancel page asks customers to call so T-Mobile can review the account and offer options before they cancel.
Written complaint
MailT-Mobile Customer Relations (billing disputes and Notice of Dispute) T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380Written billing dispute within 60 days of the bill, and the Notice of Dispute required before arbitration.
Federal regulator
State agency
Your state’s attorney general. Find it in the list of state agencies (also as JSON:
states/<code>.json, for example states/ny.json).Arbitration
60 days after T-Mobile receives the Notice of Dispute: AAA consumer arbitration (send a letter to the registered agent and to AAA) or small claims court.
Watch out
- Only the Primary Account Holder can generate a Temporary Port Out PIN or remove Port Out Protection; an agent cannot do this for the person.
- Calls to customer care require the account PIN/passcode; online access requires the T-Mobile ID password.
- Cancellation is by phone; the cancel support page has no online cancel button.
- T-Mobile support pages hide key details in collapsed sections that do not show in plain page text.
Let your AI agent handle this
Escalate Anything is a free, open-source MCP server for Claude, Cursor, VS Code, Gemini CLI, Codex and other AI apps. Your agent gets this playbook, keeps a case log with reference numbers and follow-up dates, and drafts each message for you to approve.
1. Set it up (needs uv):
uvx escalate-anything setup2. Ask your agent:
My T-Mobile bill went from [old amount] to [new amount]. Use Escalate Anything to get it back down.Source code, other install options and the Claude Code plugin