Hi, I'm about to ring up Three and ask them about this but I have a funny feeling they won't be of much help. I activated my iPhone 5 yesterday and put in my Three Nano-SIM on a SIM-Only contract that had started on Saturday. The phone recognised the network and displayed a few bars of 3G signal in my house. I registered to MyThree via the website because the app said I wasn't recognised to be on the Three network. It displays my allowances etc just fine. I can receive and send calls and texts, and can load pages through WiFi just as usual. However disable WiFi or leave the house, and no matter how good my 3G signal is, it refuses to load any webpages or basically anything that requires the internet. Is there some part of the activation process I forgot to do or something? Any help appreciated. On a side note, notifications for things like Twitter and facebook worked brilliantly on my iPhone 4 but for some reason will not work at all on my iPhone 5. I've checked and they're turned on in the notification center... Thanks.