When you purchase an iPhone 4, your cellular provider will give you a new micro SIM card to use with your new iPhone. Although the cellular provider will automatically activate the SIM card for use on ...

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 ...

You’ve just bought yourself an iPhone – welcome to the club! However, while you thought you’d just be able to pop your existing SIM card into your iPhone, you might be wrong. That’s dependant on not ...

You may have had AT&T SIM (Subscriber Identity Module) card problems on your iPhone before or received the notification "Airtel SIM not provisioned." This happens sometimes, and the reason is fairly ...

Apple has had support for eSIM since the iPhone Xs/XR, but it has gone all in by ditching the physical SIM card slot for iPhones from version 14 and later sold in the U.S. While models sold in other ...

Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...