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

If you need to find out your iPhone's carrier without a SIM card installed, you can do so through the Settings app.

Changing physical SIM cards on your phone is always a fiddly business. First, you have to root for the little SIM tray tool ...

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 ...