Your SIM Toolkit is a crucial part of your smartphone's software that makes your phone work. Here's what the software does ...

A physical SIM card is essentially a tiny card with a chip that connects your phone to your wireless carrier. It contains ...

Unlike a physical SIM card that you insert into your phone, an eSIM is built right into your device. It can be activated digitally, usually by scanning a QR code or through your mobile carrier's app.