Unlimited Data SIM

Our unlimited data SIM plans provide 4G and 5G ready coverage across the UK – but rest assured. You can select a Pay Monthly Unlimited Plus plan and choose O2 Travel as one of your Extras to get 25GB free international roaming data in our Europe Zones. If you’re travelling within an Inclusive Zone, your allowances will work as they do in the UK. Outside Europe, you can Bolt On all the minutes, texts and data you need across many destinations worldwide (including USA, Canada, Australia, New Zealand and Mexico) at a fixed day rate.

Make the most of O2’s renowned network with a 5G ready phone and SIM card. Location may affect mobile data reception so check if 4G and 5G coverage is available in your selected area.

Grab preloaded Data Only SIM deals for tablets and dongles. Top up whenever is best for you – no contract needed. Or, treat yourself to superfast 4G & 5G routers with unlimited data plans to stay connected on your travels with a reliable mobile hotspot for several devices at once.

Unlimited data can be a life saver when you’re on the go. No worrying about running out when you need it the most. Whether navigating to a destination or putting on your favourite tunes and TV shows on the way home, the world remains at your fingertips with an unlimited data SIM plan. Plus, when broadband WiFi is out of range, you can switch up to mobile data in an instant - perfect for gaming, streaming, and social media.