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 ...

A SIM card, or subscriber identity module card, is essential component of any phone. It connects your device to a cellular network and stores vital information, including your phone number. Many ...

If you plan to sell your iPad or iPad 2 before the new iPad’s release, likely coming next month, then removing your Sim Card and canceling 3G service might be a good idea. You will also want to erase ...