DisclosureLens
HackingTelecom & MediaInformationCustomer Data InvolvedData ExfiltratedIdentity (basic)Government IDMedium

T-MOBILE USA, INC.

bd_37a77dce59f0dd1a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 27, 2023

Filed

Apr 28, 2023

To disclose

5 weeks

Affected · nationwide

8361 in this filing

Linked

3 filings

Confidence

65%
Full breach record for T-MOBILE USA, INC. →22 incidents on file

T-Mobile, USA experienced a security breach between February 24, 2023, and March 30, 2023, which was discovered on March 27, 2023. The breach, described as an external system hack, affected 836 individuals. The compromised information included names in combination with driver's license or non-driver identification card numbers. T-Mobile notified the affected individuals on April 28, 2023, and offered 24 months of complimentary credit monitoring and identity theft protection services through Transunion.

Leak gap clock✗ Leak >180d5 weeks discovery → filing
⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 31 days
discovery → filing · 5 weeks / 32 days

Feb 24, 2023

Begins

Mar 27, 2023

Discovered

Apr 28, 2023

Filed

This filing is one of 3 about the same incident.View merged incident
A leak claim by arvinclub about this victim predates this filing by 596 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Filing propagation · 3 filings · 3 states

View merged incident ↗
Massachusetts State AGApr 28 · first
Indiana State AGApr 28 · first
Maine State AGApr 28 · first · this page

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.