DisclosureLens
HackingTelecom & MediaInformationData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial credentialsMediumActive

T-MOBILE USA, INC.

bd_b2fa46f755306925 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 17, 2021

Filed

Aug 25, 2021

To disclose

8 days

Affected

Not disclosed

Linked

7 filings

Confidence

64%
Full breach record for T-MOBILE USA, INC.22 incidents on file

T-Mobile USA reported that on August 17, 2021, it learned of unauthorized access to personal data. The breach occurred on July 22, 2021. Affected data includes names, driver's licenses, government IDs, Social Security numbers, dates of birth, prepaid PINs, addresses, and phone numbers. T-Mobile states the investigation is ongoing and has reset prepaid PINs. Customers are offered free identity theft protection.

California clockDiscovered Aug 17, 2021Notified Aug 19, 20212d CA 60-day OK8 days discovery → filing

Incident timeline

undetected · 26 days
discovery → filing · 8 days

Jul 22, 2021

Begins

Aug 17, 2021

Discovered

Aug 25, 2021

Filed

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Show 2 more filingsup to 6d gap

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

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.