Since my Galaxy Ace was refreshed on 17th I have used about 400Mb of data out of my 500Mb allowance. One night so much data moved it flattened the battery! I have tried to stop it by switching of 3G and Packet Data, but the data now just moves through my wi-fi connection. Next week I will be away from home and dependant on 3G so I need to get it sorted. I downloaded My Data Manager and a lot of the data seems to be moved by OS Services and some by Google Play Store. When I could look at the timing it moved in fairly regular packet sizes at a regular number of minutes past the hour.
Any ideas what might be going on and what I can do about it?