Have you ever wondered exactly how a SIM card works? We'll help you understand why your phone needs one and what they do to keep you connected.

These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another.

Degrade a SIM card enough and it will no longer work as a key or even be recognised as a SIM card, but until you reached that point phone functions should continue to work normally.

For the past three generations of the iPhone, Apple has stood alone in a particular area: eSIMs. Apple made a shift that many ...

For many years, mobile phones received cellular service through a physical SIM (subscriber identity module) card that connected your handset to your phone carrier. These physical SIM cards made it ...