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Cause 3 of 4: Mobile data is turned on
If mobile data is turned on, this will affect the battery life.
Solution: Turn off mobile data.
Find "Mobile Data"
Press Settings.
Press Mobile Data.
Turn mobile data on or off
Press the indicator next to "Mobile Data" to turn the function on or off.
Return to the home screen
Press the Home key to return to the home screen.
Or select...
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