So you've chosen Ultra Mobile as your carrier. Before you start enjoying your plan, you need to install your SIM card – here's a step-by-step guide.

Want to install an extra SIM card in your smartphone? Here's what you need to do just that.

Seeing “No SIM” or “Invalid SIM” on iPhone? Check your SIM card, restart, or update your carrier settings. Simple fixes often ...

All of your contacts will be written to the SIM card, which is called a "SmartChip" on LG phones. Remove the SIM card and install it in a different phone to access the contacts you just copied.

Switching to the Un-Carrier can be exciting, but you have to know how to get set up. Here's how to activate a T-Mobile SIM card.

Criminals don't need a physical SIM card to make the swap. In most cases, they call the mobile carrier and impersonate a victim. Here's how to protect yourself.

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.

[ youtube video link for mobile viewing ] One of the first videos I ever did up for CrackBerry.com was a BlackBerry 101 on How to Install the MicroSD Card into your BlackBerry Smartphone. To this day ...