Switching carriers or using a different SIM card on your iPhone doesn’t have to be complicated. If your device is SIM-locked, ...

iPads bought on a network contract may be SIM-locked to that network. Here's how to unlock the iPad - and advice on whether it's legal for you to do so ...

You can set a SIM PIN code to prevent people from accessing data such as contacts stored on the SIM card without your permission, even if they physically have your phone and then steal the card.

How to unlock an iPhone on AT&T On its unlock page, AT&T says eligible iPhones that are “active on the AT&T network” should automatically unlock, provided you meet the unlock requirements.

Why is it difficult to unlock phones or smart watches? Mobile phones, smart watches, and SIM cards often come with several codes, such as PIN, PUK, restriction codes, and security codes. These codes ...