United States telecom giant T-Mobile is looking into an alleged massive information breach that may accept compromised more than 100 million users.

According to Vice'south Motherboard, T-Mobile is investigating an alleged data breach claimed by the writer of the post on an underground forum. The Dominicus report says the hacker claims to take obtained information on more than 100 meg customers from T-Mobile servers.

The seller is asking for 6 Bitcoin (BTC) — approximately $287,000 at electric current prices — in commutation for some of the data.

Motherboard has seen samples of the data, which include social security numbers, phone numbers, names, physical addresses, unique IMEI numbers and driver license information.

The seller told the outlet that they are privately selling most of the data at the moment just volition paw over a subset of the data containing 30 meg social security numbers and driver licenses for the BTC ransom.

Referring to T-Mobile's alert and potential response to the breach, the hacker said, "I think they already found out because we lost access to the backdoored servers."

A T-Mobile spokesperson said that the company is "aware of claims fabricated in an underground forum" and is "actively investigating their validity," adding, "We do not have any boosted information to share at this time."

Related: Ledger users threaten legal action after hacker dumps personal data

It is not the first time T-Mobile has been at the center of a cybersecurity scandal. In February, the mobile carrier was sued by a victim who lost $450,000 in Bitcoin in a SIM-swap attack.

A SIM-bandy assault occurs when the victim'south cell phone number is stolen. This can then be used to hijack the victim'south online fiscal and social media accounts by intercepting automatic messages or phone calls that are used for two-cistron authentication security measures.

In this instance, the victim, Calvin Cheng, defendant T-Mobile of failing to implement acceptable security policies to forbid unauthorized access to its customers' accounts.

T-Mobile was also sued in July 2022 by the CEO of a crypto firm over a serial of SIM-swaps that resulted in the loss of $8.seven one thousand thousand worth of digital assets.

In April this year, hardware wallet manufacturer Ledger faced a course-activity lawsuit regarding the major information breach that saw the personal data of 270,000 customers stolen between April and June 2022.