Activate a T-Mobile SIM card on your phone. The most common way to activate a T-Mobile SIM card is with your phone itself. It’s easy to do, and you’ll have to follow these steps: ...

If you're a new T-Mobile customer or you recently purchased a new phone, you may have a new SIM card you'll need to activate. Here's how to set it up.

T-Mobile removed the self-service option for SIM card changes in 2022 to implement new security features to combat SIM swap attacks. At the time, the company did not share a timeline for when the ...

A few months ago, a source sent The T-Mo Report a document detailing a brand new program targeting any T-Mobile customers using Sprint’s SIM cards. On June 30, Sprint started giving “targeted ...

A dual-SIM setup lets you use one phone to make and receive calls and texts from two numbers. It's also super convenient and ...