Newbie - High Data Use Question

dazedandconfuzed

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Apr 27, 2012
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Is there a way to track which apps are using data?
My wife's Galaxy SII will download 10 to 20 Mb of data overnight. :(
This is with no apps running.
Tried Onvo and it did not pick up the useage. And right now I can't use it to track since I have packet data turned off until next month.
Also using a "Data Counter Widget" that is catching it but will not show which apps are using it.
Additionally I seem to remember a setting somewhere to restrict apps to Wi-Fi only but I cannot find it again.