Phones
Tablets, laptops and dongles
SIMs and Tariffs
Accessories and more
Flexibility
Perks
Services
Connected
Live bigger with Volt
See all the reasons to choose O2
Top queries
Device help
Managing your account
Other ways to get help
A SIM enables you to use mobile network services such as voice calls, text messaging and mobile data.
Find the opener for the card holder. Insert the opener into the small hole in the card holder.
Remove the card holder from your phone.
Turn your SIM so the angled corner of the SIM matches the angled corner of the first SIM holder and place your SIM in the SIM holder.
Turn your SIM so the angled corner of the SIM matches the angled corner of the second SIM holder and place your SIM in the SIM holder.
Slide the card holder into your phone.
