To unlock your iPhone from its carrier, you'll likely need to contact your carrier directly to cancel your contract.

Major cellular carriers — Verizon, AT&T, T-Mobile, Sprint, and others — typically lock their networks to the iPhone you buy from their stores or pay for via an installment plan. What does that really ...

If you need to find out your iPhone's carrier without a SIM card installed, you can do so through the Settings app.

A SIM card, or subscriber identity module card, is essential component of any phone. It connects your device to a cellular network and stores vital information, including your phone number. Many ...

An unlocked phone is a device that has no carrier locks or restrictions. It's usually sold at full price. You can use it with any carrier of your choice, whether you're using a physical SIM card or ...