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After you purchase and use your cellphone for an extended period of time, you can change networks. However, the phone that you're currently using may not be offered on that network. If you wish to ...

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

When you unlock a phone, it means that you alone own the device and can use it with any cell phone carrier.

If you’ve ever bought a second-hand iPhone or switched to a new carrier, you may have faced the frustration of a locked device. Carrier-locked iPhones prevent you from using SIM cards from other ...

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 ...