Sorry if this has been asked before. New o2 sim in new Ipad 3g. Set up PAYG account with o2 but still cannot access 3G. If I turn wifi off and try to use Safari I'm told I am not subscribed to a mobile data service, though a 5 bar signal from O2-UK 3G is displayed top left. If I go to settings and, having put in my email and password, view my account I can see the account and cellular data number (it's even used 3MB so far!) but that's all. Am going round in circles - any help much appreciated.