O2 SIMS are served by reliable and widespread O2 network coverage, which now reaches 98% of the UK population. And when you're not using your data, you can still surf, stream, and download, at one of 15,000 free O2 Wi-Fi hotspots nationwide.
Adventuring further afield? Call, chat and surf across the continent as if you were at home, with EuropeZone roaming at no extra cost. Take your monthly data allowances with you as you travel through Europe, with no added charges.