T-Mobile US

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Verizon VZ -5.64% Communications Inc.’s first-quarter profit fell 13%, and executives warned that higher consumer prices, heavier corporate expenses and rising…

SoftBank Group Corp. 9984 2.20% said Chief Operating Officer Marcelo Claure, who helped clean up problems at the firm’s investments including WeWork Inc.…

The U.S. rollout of a new 5G wireless internet service has been contentious.After a standoff over potential risks that the connection poses to cockpit equipment, Verizon Communications Inc. VZ 0.59%…

AT&T Inc. T 1.18% and Dish Network Corp. DISH -1.07% topped the list of bidders for a swath of wireless…

B3G (Before 3G): During this time, cellphones were primarily used for talking and texting. Sure, you could load a website but you could also snowshoe from New York to Alaska in the same amount of time. CBE (Cellular Broadband Era): Once the…

The chief executive of T-Mobile US Inc. apologized to customers for a security breach that has exposed personal data from more than 50 million people and said the wireless company was working to strengthen its cyber defenses.…

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 details on more than 50 million people and…

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 million as the carrier continues to investigate the…