T-Mobile Data Breach Settlement 2026: How to File Your Claim

T-Mobile has experienced several significant data security incidents, each generating separate class action litigation:

2021 T-Mobile Data Breach (76.6 million customers): The largest T-Mobile breach involved the theft of data belonging to approximately 76.6 million current, former, and prospective customers. Compromised data included names, Social Security numbers, driver's license information, dates of birth, and phone numbers. T-Mobile settled this case for $350 million.

2023 T-Mobile API Breach (37 million accounts): In early 2023, a bad actor accessed data on 37 million current customer accounts through an API vulnerability, exposing names, billing addresses, email addresses, phone numbers, and dates of birth.

Additional incidents: T-Mobile has also disclosed smaller breaches in 2019, 2020, and 2022 involving various subsets of customer data.

If you were a T-Mobile customer, Metro by T-Mobile subscriber, or even a prospective applicant who had a credit check run during these periods, you may be covered by one or more of these settlements.

For the main $350 million settlement (2021 breach), the class definition covers: current T-Mobile customers, former T-Mobile customers, and prospective customers whose personal information was compromised in the 2021 breach. You do not need to have received a notice letter. You do not need to currently be a T-Mobile customer.

Key eligibility points: - If you were a T-Mobile customer at any point between approximately 2018 and August 2021, your data may have been in the compromised records - Metro by T-Mobile subscribers are included in the class - You do not need to have experienced identity theft or fraud — exposure of your data in the breach is sufficient for the basic claim - Former customers who closed their T-Mobile account before 2021 may still be eligible if their data remained in T-Mobile's systems

For more recent breach cases (2022, 2023), separate settlement proceedings are at various stages. SettlementRadar tracks each T-Mobile settlement separately with individual class period dates and filing deadlines.

The $350M settlement fund pays out in tiers:

Basic tier (no documentation required): $25 per basic claimant, paid via check, PayPal, or Venmo. This is available to anyone who confirms they were a class member — no receipts, no documentation of harm needed. Given T-Mobile's approximately 76 million affected customers, the actual payment per basic claimant may adjust based on final claim volume.

Documented loss tier: Up to $25,000 reimbursement for documented out-of-pocket losses caused by the breach. Qualifying losses include: cost of credit monitoring or identity protection services purchased after the breach, unreimbursed losses from unauthorized transactions on your financial accounts, professional fees paid to address identity theft, and time spent addressing identity theft at a rate of $25/hour (up to 20 hours).

California claimants: California residents receive an additional $25 on top of their base claim, reflecting California privacy law.

Bottom line: if you do nothing except confirm your membership in the class, you receive $25. If you have any documentation of actual financial harm following a T-Mobile data breach, file the documented loss tier — the additional forms are worth completing.

Filing takes 5–10 minutes for the basic claim. Documented loss claims with uploads may take 15–20 minutes.

Steps: 1. Find the specific T-Mobile settlement on SettlementRadar and click "File Claim" 2. On the official settlement administrator website, verify your personal information matches what T-Mobile would have on file (name, address, date of birth) 3. Enter your T-Mobile phone number or account number from the covered period — search old bills or use the email associated with your My T-Mobile account 4. Select your claim tier: basic (self-certification) or documented loss (if you have qualifying expenses) 5. If filing a documented loss claim, upload your supporting documentation 6. Choose your payment method (PayPal, Venmo, check, or ACH) 7. Submit and save your confirmation number

Do not pay anyone to file on your behalf. Legitimate settlement administrators never charge filing fees, and no service should take a percentage of your payout as a condition of filing.