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 ...

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 ...

Do you get the error message “No SIM Card Detected” or “No SIM Card Installed” after inserting a SIM card into your phone? This problem often occurs when you ...

Phone suddenly showing "No SIM" or "Invalid SIM"? Don't panic, there are a few quick checks that can get you reconnected fast.

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 ...

Eli covered the latest in the ever-changing worlds of telecom, streaming and sports. He previously worked as a technology reporter at USA Today. With eSIMs, you'll still be able to take full advantage ...

It is worth mentioning that if you have purchased an iPhone 14 in the United States the latest range of iPhone 14 devices from Apple are not equipped with physical SIM trays, but uses a digital eSIM ...