Below is a guide to what sim size you may need.
Your phone’s user guide will tell you which size to use, and how to insert it. Our device guides can also give you more advice. We use multi-SIMs, which allow you to pop out the size you need for your device. The video below explains how to do this.
If you’ve just upgraded to a new device, you should continue to use your old SIM card – you only have to use the new SIM sent with your upgrade if your old SIM doesn’t fit your new device. Find out more in our FAQ on new SIM cards
Find out how to order a replacement SIM for your device.
If you’re using an Apple Watch, this has a built-in SIM called an eSIM, so you won’t need to insert a physical SIM card. However, if you’ve received a replacement device, you’ll still need to activate the new eSIM.