T-Mobile breach exposed 79 million customer records in 2021
A data breach at T-Mobile exposed 79 million customer records in 2021. A US$350 million settlement payout for affected customers was pursued, with reports in 2025 of payment delays and victims receiving payouts. Washington state brought legal action against T-Mobile over the incident, and a court ruled in 2026 that the company had breached Washington's data breach notification law.
Key facts
- Affected organisation
- T-Mobile
- Incident type
- Data breach
- Occurred / detected
- Not confirmed
- Scale of damage
- 79 million customer records
- Cause / method
- Not confirmed
- Location
- United States
If your data was exposed
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
Timeline
- A dispute arose between lawyers over a US$78 million claim for legal fees relating to the data breach settlement.
- Washington state brought legal action against T-Mobile over the 2021 breach of customer records.
- Plans emerged to distribute a US$350 million settlement to customers affected by the data breach.
- Compensation payments of up to US$25,000 were delayed.
- Some victims received settlement payments exceeding US$4,000.
- A court ruled that T-Mobile had breached Washington state's data breach notification law.
14 related reports
- Lawyers fight over $78 mln fee bid in T-Mobile data breach settlement
- Washington sues T-Mobile over 2021 data breach that spilled 79 million customer records
- Washington Attorney General Sues T-Mobile Over 2021 Data Breach
- Washington files lawsuit against T-Mobile after data breach
- T-Mobile Sued Again Over Massive 2021 Data Breach
- T-Mobile to Shell Out $350 Million to Customers in Wake of Massive Data Breach
- This Mobile Phone Company Is Settling a Data Breach With $25K Payouts — Do You Qualify?
- T-Mobile Data Breach Payouts Go Out Soon: Here's When You'll Get Paid
- T-Mobile cyberattack settlement payments up to $25K delayed: Here’s when they’ll go out
- Checks Being Sent To Victims Of T-Mobile Data Breach
- Massive T-Mobile data breach payments prove all settlements aren't created equal
- People are getting over $4,000 each from the T-Mobile data breach settlement — here's why
- T-Mobile violated WA data breach notification law, judge rules
- T-Mobile is investigating a reported data breach. It sounds real bad.
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The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.