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 ...

One of the first things that any Galaxy S9 user needs to do when unboxing a Galaxy S9 is to insert a SIM card. This is especially important if you have the GSM version of the Galaxy S9. Having a SIM ...

Dual-SIM phones allow you to easily manage (and make or receive calls on) two numbers on a single handset. This means you can juggle a work and a personal contact without switching devices, have ...

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 ...

Today’s Android phones are significantly more advanced than they were just a few years ago, but one thing hasn’t changed: the need for a SIM card. Every phone needs a physical or eSIM card to make ...

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 ...