Type USSD codes on your iPhone to access hidden cellular features quickly. Here, we'll list some of the most useful ones.

A new rumor claims T-Mobile may soon start auditing customer plans to ensure the proper devices are being used with the right ...

Save up to $1,000 on a new phone at T-Mobile with a new line and/or trade-in. The best part? You might just get a free phone ...

When you trade in your old phone with T-Mobile, you'll get it for free. New and existing customers can swap an old device in ...