U.S. telecom giant T-Mobile is looking into an alleged massive data breach that may have compromised more than 100 million users. According to Vice's Motherboard, T-Mobile is investigating an alleged data breach claimed by the author of the post on an underground forum. The Aug. 15 report says the hacker claims to have obtained data on more than 100 million customers from T-Mobile servers. The seller is asking for 6 BTC — approximately $287,000 at current prices, in exchange for some of the data.