Help and Support for
Samsung Galaxy A3 (2016)
Android 5.1.1
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My Samsung Galaxy A3 (2016) Android 5.1.1 uses a large amount of mobile data
Cause 2 of 2: Automatic app update via mobile network is turned on
If automatic update of apps via mobile network is turned on, your phone will use mobile data.
Solution: Turn off automatic update of apps via mobile network.