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 ...

Inserting the SIM card into the BlackBerry Q5 is very different from with the two previous BlackBerry 10 smartphones - the Z10 and Q10. For new users of the Q5 this is just a simple set of ...

If you’ve bought an iPad with 4G/cellular capabilities (we discuss whether that’s a good idea in our 2015 iPad buying guide) or a new iPhone, you need to buy and install a SIM card. Here, we explain ...

Imagine trying to call someone urgently from your Android device only to be greeted by the error message "SIM card not detected." This error means that your device is ...

SIM cards have been an integral yet often forgotten part of owning a smartphone for the past few decades. For most users, the SIM card defines the basic commercial relationship they have with their ...