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

To check if your Android phone is unlocked, try swapping in another SIM card or test your network settings. If calls work, ...

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 ...

A user has an iPhone 3G from a relative in France. Has the phone, but no SIM card. Can't activate it initially because he has T-Mobile, so no valid SIM at all. I can't even use an ATT SIM (in US ...

The easiest way to know whether your phone is locked to the network or not is to simply use a SIM card from another carrier. If it connects to the other network without issue, the phone is ...