Phones
Tablets, laptops and dongles
SIMs and Tariffs
Accessories and more
O2 for you
Saving you money
Perks and rewards
Stay connected
Live bigger with Volt
See all the reasons to choose O2
Help and support
Most popular
Useful links
Contact us
A SIM enables you to use mobile network services such as voice calls, text messaging and mobile data.
1. Remove the card holder
Remove the SIM holder from your phone.
