You can check to see if your iPhone is unlocked from a carrier using any of a few different methods.

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

An unlocked phone is the key to getting service from an alternative carrier. Here's how to check if a phone is unlocked.

If you’ve bought a cellular iPad from someone other than Apple, you may later find that the iPad is locked to a particular network. If you insert a SIM from a ...

The new Samsung Galaxy Note 5 requires a nano SIM card for you to place calls, access the Internet, download applications, and share photos over your network service ...

The big reason to immediately update to the November security patch – besides being the first one for the Pixel 7 – is that it contains a bug fix for a security issue that can unlock and bypass your ...

(Subscriber Identity Module lock) A function in GSM cellphones that restricts the phone's use to a particular cellular carrier identified by a SIM card. SIM locks are used to ensure subscribers finish ...