Although cell phones have changed significantly in the last few decades, they still need a SIM. Some phones have moved to eSIMs, but many still use physical SIM cards. If you have a working phone, ...

If you can't make a call or if you see an error message that your phone's SIM card is not working, there are several ways to ...

To remove the SIM card from your iPhone, you'll need to eject the SIM card tray with a special tool or paperclip.

The iPhone Air will only have an eSim - will other phone makers also shift away from the familiar - but fiddly - plastic ...

A dual-SIM setup lets you use one phone to make and receive calls and texts from two numbers. It's also super convenient and can save you serious cash when traveling. We show you how to use two SIMs ...

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 ...