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

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

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. I started my career with CNET all the way back in ...

Your phone's SIM card allows the device to make calls, send texts, and connect to the internet. The SIM card provides a phone number that identifies your device on the carrier's network, whether it's ...