I havent got a data plan - on tesco PAYG🙂 (only joking about hacking - I hope 😱)
I was wondering if it could be location services? I thought that if you exited from apps then they didn't run but I read that you have to close all safari web pages before exiting. Since I upgraded I had two requests to use location or something - one was for maps, but I assumed that if the phone was in sleep mode it wouldnt access data? 😕
Again I'm assuming that mail only retrieves when I ask it to?
Yesterday I got a text at 5.20am telling me I had £1 of credit left!