MisuseTelecom & MediaInformationPrivilege AbuseCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

T-MOBILE USA, INC.

bd_5522d81bfe6fad37 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 12, 2021

Filed

Mar 16, 2021

To disclose

5 weeks

Affected

1state residents only

Confidence

66%

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

T-Mobile USA, Inc. notified the NH Attorney General that a T-Mobile representative accessed one New Hampshire resident's account information without authorization on February 12, 2021. The accessed data included name, address, email, account number, last 4 of SSN, DOB, and driver's license details. The representative reassigned the phone line to a different SIM card. T-Mobile terminated the access, reverted changes, disciplined the employee, and offered two years of credit monitoring.

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Incident timeline

discovery → filing · 5 weeks / 32 days

Feb 12, 2021

Begins

Feb 12, 2021

Discovered

Mar 16, 2021

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: T-MOBILE USA, INC.
norm: t mobile usa
Domain: t-mobile.com

Name: T-MOBILE USA, INC.
norm: t mobile usa
Domain: t-mobile.com
Industry: Telecom & Mediallm

Discovered: Feb 12, 2021
Breach occurred: Feb 12, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 11, 2021
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Insider
Threat actor: Internal
Regulator citations: Notified New Hampshire Attorney General
Initial access: insider_action

During the incident: Terminated the unauthorized access
Reverted any account changes to the impacted customers
Reported this incident to law enforcement
Provided further education and discipline to the representative
Changes made: Offering two years of free credit monitoring and identity theft detection services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(32 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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.

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/t-mobile-usa-20210316.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 16, 2021
Raw hash: 86a8cc6798adf0a42a9b6195d3a591041a0230a25e7986492a3897825da1b814

Reporting entityT-MOBILE USA, INC.

Victim entityT-MOBILE USA, INC.

Incidentdiscovered Feb 12, 2021

Stated responseTerminated the unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov