A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text ...

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 ...

You don't need a SIM card and cellular service to use most features of today's iPhones and Android phones. Most apps and services run just fine as long as you have access to WiFi, and you can even set ...

To unlock your phone from Verizon, the phone must be 60 days past its purchase date and not flagged as lost or stolen.