T-Mobile USA

Disclosed Mar 10, 20206 years ago1,027 affectedConfirmed

Official notice

What is known

People affected	1,027 (as reported by the organization)
Disclosed	Mar 10, 2020
Happened	Nov 26, 2019
Attack	Not stated
Data exposed	Not stated
Sector	Telecom · US
Status	Confirmed

Sources

Source	Kind
Indiana Attorney General 2020 data breach report: T‐Mobile USAin.gov · Official notice	Official notice

Notices filed

Where	Filed	People
Indiana AGresidents of IN	Mar 10, 2020	7

Other breaches at T-Mobile USA

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Jan 19, 2023Jan 19, 20233 years agoHacking	Jan 19, 20233 years ago	Hacking	Telecom	Confirmed	Unknown
Disclosed Aug 24, 2021Aug 24, 20215 years agoHacking	Aug 24, 20215 years ago	Hacking	Telecom	Confirmed	Unknown
Disclosed Oct 1, 2015Oct 1, 201510 years ago	Oct 1, 201510 years ago	Not stated	Telecom	Confirmed	Unknown

History of this record

2026-09-25 · added · backfill source

First seen 2026-09-25 (Indiana AG), confirmed by Indiana AG. Record counts are as reported. Not legal advice.

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