If you went the prepaid route and ordered T-Mobile's no-contract iPhone 6, you may have no idea what to do once it arrives.

Luckily, if T-Mobile won’t unlock your phone, one of the many unlock services out there will be able to.

Now that Apple sells unlocked iPhones in the U.S., you can use an iPhone 4 on T-Mobile's network. Here's how.

You don't have to lose your favorite phone just for leaving T-Mobile. Here's how to unlock any T-Mobile phone and take it with you.

We outline four simple methods to set up an iPhone so that it can be used without a SIM card, by a child or someone who doesn't have a mobile contract. And we show how to activate without a Wi-Fi ...