Help and Support for
Samsung Galaxy J3 (2016)
Android 5.1.1
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My Samsung Galaxy J3 (2016) Android 5.1.1 uses a large amount of mobile data
Cause 1 of 1: Notifications are turned on
If notifications are turned on, your phone will use mobile data when applications send push notifications and is not connected to a Wi-Fi-network.
Solution: Turn off notifications.