These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another.

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.

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 ...

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

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 ...

The way we communicate is changing, and the old-school SIM card starts to feel a bit outdated. Adapting to these changes can be challenging. But don't worry—virtual phone numbers are here to save the ...