1 month contract with 250GB 5G Data. O2 Priority, Charge to mobile, Recommend a Friend and Earn Rewards, 5G-ready, O2 Wi-Fi Hotspots, No speed caps, Wi-Fi Calling, eSIM Compatible. Happy with your phone? Save money with a Pay Monthly Mini SIM tariff. You can even keep your number. Get VIP treatment, with freebies and prize draws on Priority. And stay connected, with free O2 Wifi when you're out and about. All our sim only plans are set up for O2 5G – just let us know if your device is 5G ready, and we’ll make sure you get a 5G SIM.