Want a small phone with a price tag to match? This Mini 4G dual-SIM smartphone is fully functional but actually fits in your pocket. This little phone is about the size of a credit card, but comes ...

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 ...

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. I started my career with CNET all the way back in ...