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.

Are you switching phones or carriers? You'll need to learn how to remove a SIM card from your Android phone. Let's help you out!

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.

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.

A No Sim Card issue is caused when your phone either fails to recognize the Sim card or can’t read any information it contains.

The tray closest to the top is for the microSD card, and remember you can put up to a 32GB microSD card to expand the storage space of your phone.

Does your phone say "No SIM," "No SIM Card Installed,” or "No SIM available"? Here's what that means and how you can fix it.