T-MOBILE USA, INC.
bd_4f029ec65fed3c95 · schema v1 · pii pii-v1
Full breach record for T-MOBILE USA, INC. →22 incidents on fileT-Mobile USA, Inc. reported a cybersecurity incident in South Carolina affecting legacy Sprint and T-Mobile customers. Unauthorized access occurred on or before July 19, 2021, and was discovered on August 17, 2021. Personal data accessed included names, phone numbers, dates of birth, driver's license IDs, and Social Security numbers. No financial or payment card data was compromised. T-Mobile engaged forensic experts and federal law enforcement, offering two years of free identity protection.
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Incident timeline
Jul 19, 2021
Begins
Aug 17, 2021
Discovered
Aug 31, 2021
Filed
Linked disclosures
Why this link?Regulatory filings (6) · sorted by filing gap
- Oregon State AGbd_f59f5dad6f2da02e2021-08-27 · +4dVerified
- Massachusetts State AGbd_6e3dba4ecc8166012021-08-26 · +5dVerified
- California State AGbd_b2fa46f7553069252021-08-25 · +6dVerified
- Washington State AGbd_6c7de9e9876d5dac2021-08-24 · +7dCandidate
Show 2 more filings ↓Show fewer ↑up to 12d gap
- New Hampshire State AGbd_378732a40d9f790b2021-08-19 · +12dVerified
- Delaware State AGbd_f401f39a02cdaac62021-08-19 · +12dVerified
Filing propagation · 7 filings · 7 states
View merged incident ↗Pattern: first filing Aug 19 (NH), last Aug 31 (SC) — a 12-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.