(Bloomberg) -- Suspicious behavior on T-Mobile US Inc.’s network devices tipped off the company to a breach that was potentially part of a sprawling cyber-espionage campaign that has raised ...

(Bloomberg) -- The government watchdog that oversees foreign investment in the US for the first time named a company it had penalized — telecom giant T-Mobile US Inc. — as it escalated ...

(Bloomberg) -- T-Mobile US Inc., the second-largest mobile carrier in the US, has agreed to buy US Cellular Corp.’s wireless operations and some of its spectrum assets for about $2.4 billion.