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.

Regular and Micro-SIM cards are too big for the iPad or iPhone, but this trick enables you to cut down a SIM card to a Nano-SIM so it fits into an iPhone or iPad.

Find out how to trim your own micro-SIM card for use in phones that require this new format.

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

You don't need to buy a new iPhone to be able to run multiple SIM cards. In fact, you can run as many as five SIM cards in your existing iPhone.

If you want to upgrade your iPad to have 3G/4G capabilities, you need to equip it with a SIM card. Our beginners' tutorial explains where to get the right SIM card, and how to do install it.

To remove the SIM card in your ‌iPhone‌ or iPad, you'll need the SIM eject tool that Apple includes in the device's box. If you don't have one, you can use a regular paper clip.

Activating a new SIM card on your iPhone is a simple process that just takes a few easy steps. Read more: Best iPhone of 2024 Follow our step-by-step guide to help get your new iPhone up and running.