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

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.

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.

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.

SIM cards are so thoroughly integrated into our everyday lives that we don't pay attention to them anymore and do not understand what they are used for. In this article, we dig into the concept of SIM ...

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

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.