If you need to find out your iPhone's carrier without a SIM card installed, you can do so through the Settings app.

You'll need your iPhone's IMEI number if you want to unlock it and use it on a different cellular provider.

Changing physical SIM cards on your phone is always a fiddly business. First, you have to root for the little SIM tray tool that Apple includes in the box with its new iPhones – except those in the US ...

What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...

Anyone looking to add more than one number to their iPhone, maybe to keep work and pleasure separate or just to have multiple numbers on one device. Will be pleased to know that this is made possible ...

The IMEI (International Mobile Equipment Identity) number is a 15-digit unique identifier for all cell phones. It is used to identify the phone and the manufacturer and whether it is original or ...