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 ...

Are you trying to switch phones or carriers? You might need to swap SIM cards for that, and we can understand how confusing this process can be if you haven’t done it before. Today we’ll show you ...

When I need to take the SIM out of my iPhone (or put it back in) I always turn the iPhone off first. It struck me though that the reason I turn it off is that I have always done it in the past with ...