T-MOBILE US, INC.
bd_941baa0ef105b55b · schema v1 · pii pii-v1
Full breach record for T-MOBILE US, INC. →5 incidents on fileT-Mobile US, Inc. reported a security breach affecting seven New Hampshire residents. Between August 27 and September 6, 2020, an unknown actor accessed customer account information, including names, phone numbers, account numbers, PINs, and line counts. T-Mobile detected and terminated the unauthorized access, which appeared to involve porting lines to another carrier. Affected individuals received notification on November 25, 2020, and were offered two years of credit monitoring.
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Incident timeline
Aug 27, 2020
Begins
Sep 6, 2020
Discovered
Dec 8, 2020
Filed
Linked disclosures
Why this link?Regulatory filings (2) · sorted by filing gap
- New Hampshire State AGbd_cf163f666a2cbf5a2020-10-13 · +56dCandidate
- Indiana State AGbd_8765b3040a4bc38c2020-10-09 · +60dVerified
Filing propagation · 3 filings · 2 states
View merged incident ↗Pattern: first filing Oct 9 (IN), last Dec 8 (NH) — a 60-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.