I had a look at MyO2 and I've used 76MB of data since I set up my iPhone 5S this afternoon and over 63MB that was Facebook but I've been on wifi most of this time so I'm at a loss as to why it would use that much. I've now turned off location services for FB (which I didn't on my iPhone 5) but does anyone have any ideas a) why it's doing this and b) what I can do to stop it?
I know about iPhones using data if they come out of sleep mode but I've never had this sort of problem before. I've searched but can't find anything about Facebook - apologies if I've missed something.
