You'll need your AT&T Wireless transfer PIN to keep your old number when switching from AT&T to another carrier. You don't need this number when you change your phone number with AT&T. This guide ...

Buying a shiny new iPhone is a great feeling. All those features and cameras to experiment with can be exciting. But in the end it’s still a phone – so you’ll want to ensure that people can reach you ...

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 ...