T-MOBILE US, INC. — August 2020 breach

Clustered 3 filings across 2 jurisdictions · filing window Oct 9, 2020 → Dec 8, 2020. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

3 filings

States

Affected · reported

not comparable

First → last filing

Oct 9, 2020 → Dec 8, 2020

Merge confidence

100%

incident inc_122523b2b85d412c · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 3 regulatory filings. The filings describe unauthorized access. Intrusion Aug 27, 2020–Sep 6, 2020, discovered Sep 1, 2020 — the first regulatory filing landed 38 days later. Data reported: Government ID, Identity (basic), Financial credentials, and 1 more. Notifications rolled out on a 60-day schedule across 3 filings beginning Oct 9, 2020. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay

38days

Discovered → first regulatory filing

Discovery variance

5days

Range of discovered_at dates across filings

Filing span

60days

Time between earliest and latest filing

Not recorded for this incident

Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.

No cross-filing comparison data available for this incident.

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