TL;DR: How do I know if my phone is unlocked? You can contact your carrier to see if your phone is eligible for unlocking. Another way to check is to insert a SIM card from a different provider. If it ...

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

It's not always easy to tell if an Android device is locked to a cellular/wireless provider, but there are methods to retrieve this information. If your device is locked, it will only take SIM cards ...