T-Mobile and AT&T Go Back and Forth in Court Over Customers

WASHINGTON, Dec. 10, 2025 – T-Mobile is trying to take customers from its rivals, and has built a tool to make it as easy as possible to switch.

Now, AT&T is asking federal judges to block T-Mobile’s switching tool from accessing AT&T customer account data. T-Mobile wants the request denied.

The request should be denied, T-Mobile says, because it’s no longer doing what AT&T originally complained about.