A SIM card is a smart chip which goes into a mobile device and connects you to our network so you can call, text and use data. The SIM includes the information for your account with us and identifies you to our mobile network.
Which size SIM you need will vary depending on your device. Fortunately, we now use Multi-SIM cards which allow you to pop out the size you need. Your phone’s user guide will tell you which size to use, and how to insert it. Our device guides can give you more advice.