How to painlessly switch iPhones and keep all of your data

To switch from one iPhone to another, you should back up everything to your iCloud account and then restore it on the new ...
CCM

SIM card: what it is, how to remove, install, in an iPhone

What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...

How to remove the SIM card from your iPhone to replace it or throw it away

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

Where is the SIM card in my iPhone? Here's how to remove it easily.

A SIM card, or subscriber identity module card, is essential component of any phone. It connects your device to a cellular network and stores vital information, including your phone number. Many ...
PC Magazine

Using Two SIM Cards Is Easy and Can Save You Money. Here's How to Do It

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 ...