A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.

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 ...

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 ...

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

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 ...

Smartwatch with sim card are a perfect extension of technology that keeps you updated without needing your smartphone.Based on LTE/eSIM, these wearables make and receive calls, texts and stream on ...

TOKYO, April 3 (Reuters) - Japan's government will call on mobile phone operators this year to remove restrictions on handsets that currently block use of different SIM cards, media reported on ...