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Latest / California / October 2015

T-Mobile USA, Inc.

T-Mobile USA, Inc. notified California AG on Oct 1, 2015 of a data breach, which occurred on Sep 14, 2015. Data exposed: Social Security number, Passport number, Financial / bank account, Date of birth, Military ID, Postal address, Name.

All 3 filings by T-Mobile USA, Inc., state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
T-Mobile USA, Inc.
Source
California AG · source record
Date reported
Oct 1, 2015
Date(s) of breach
Monday, September 14, 2015
Residents affected
Not published by this source
Data exposed
Social Security number Passport number Financial / bank account Date of birth Military ID Postal address Name
Notice letter
Sample notice (PDF)
Days to notice
17 days from the end of the breach window (Sep 14, 2015, no discovery date in the letter) to the California record (Oct 1, 2015). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
First seen by BreachTally
2026-10-30 16:22 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 16:22 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by T-Mobile USA, Inc.

OrganizationSourceStateReportedResidents affectedData exposed
T-Mobile USA Oregon DOJ OR Aug 27, 2021 Not published Not stated
T-Mobile USA California AG CA Aug 25, 2021 Not published Social Security numberFinancial / bank accountUsernames / passwordsPhone number+1

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.