Data Usage

[SP4]

I recently 'upgraded' my sim only contract to 6GB date - this was purely because it was cheaper than my current 1GB data contract. I have never gone over my 1GB as am nealry always on wifi. Now for the last 2 months all of my 6GB is gone after 3 weeks! I'm not doing anything different to normal, if anything Im using less as I have a job in a school and cannot use my phone! How is this even possible? Is it worth a call to 02 to ask them to check ? Any help appreciated. Thanks 

[Enlli]

May be worth looking at the data usage figures On your phone first. If you look at individual apps you may be able to narrow it down

[Oxonian]

@SP4 

It might be worth closing all of your apps down - on a Samsung Galaxy it is "Close All" when the apps are in preview mode. You can then just re-open the apps one by one as you require them. 

As @Enlli has suggested, you might have a random app that is draining your data. If you can identify it, I suggest that you uninstall it, reboot your handset and reinstall it. You can then monitor it to see if the problem recurs.