The carrier added 324,000 mobile-phone customers in the first three months of the year, beating Wall Street projections.

AT&T shares fell 2.8% during Friday's session. Investors reacted to the T-Mobile selloff with potential concern for the ...

The smartphone ecosystem has avoided the biggest brunt of President Trump's tariffs, for now. But if that for now ends, major ...

T-Mobile US Inc. reported better-than-expected sales and profit for the first quarter even as new mobile-phone subscribers ...