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 ...

Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...

Setting up a new iPhone can be an exciting process. You get to pick between either carrying your data over from your previous device or starting fresh to avoid any clutter. Though many consider social ...

Sareena was a senior editor for CNET covering the mobile beat, including device reviews. She is a seasoned multimedia journalist with more than a decade's worth of experience producing stories for ...

This is not as easy as it sounds — and it’s not common advice. But there’s a new warning for iPhone and Android users to change the default PIN and lock SIM cards “to limit an attacker’s ability to ...