T-Mobile US

The hacker who is taking responsibility for breaking into T-Mobile US Inc.’s systems said the wireless company’s lax security eased his path into a cache of records with personal…

T-Mobile US Inc. said the hack of its user database exposed an additional six million customers’ details, bringing the total number of compromised user records to more than 54…

T-Mobile US Inc. said hackers took the Social Security numbers and other personal information of more than 40 million current and prospective customers, a brazen heist that could…

T-Mobile US Inc. said it suffered an intrusion into a company database and was investigating the extent of the breach, after personal data on some of its wireless subscribers was…

Cellphone carriers have reported adding millions of new U.S. wireless plans over the past year, making for the industry’s biggest gains in nearly a decade. Some observers question…

Cellphone carriers have reported adding millions of new U.S. wireless plans over the past year, making for the industry’s biggest gains in nearly a decade. Some observers question…

The wireless contract is staging a comeback.U.S. cellphone carriers are offering their most generous discounts in years, handing some customers brand-new devices for no money down or small…