on 20-02-2015 17:51
on 20-02-2015 17:55
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 20-02-2015 18:23
1 what it is using data if it is indeed being used
2 to report to O2 the real usage your device is using.
on 22-02-2015 12:28
on 27-02-2015 16:11
Let me explain the previous post. The above is data usage of my spare Q5 on Virgin mobile, I'm using up the data plan until the contract runs out. As you can see the BlackBerry "phones home" every hour, something around 6kb. The high figure of useage occurs when I use the phone as a mobile wifi hotspot which I connect to my BlackBerry playbook.
Neither my BlackBerry passport which is on o2 or the Q5 on Virgin uses an excessive amount of data, so the problem is probably the fault of o2 since you have turned off your data.
If possible do a security swipe on the phone and reactivate or if possible borrow another o2 sim and use it in your phone and see what happens.
I hope this helps.