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by (Genius) (10.4m points)
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Hi. This will happen if the battery-to-phone connection is not properly established. This can be caused by dirty battery or phone contacts. Remove the battery and inspect the terminals on both the phone or battery and wipe off any oxidation or dirt. In the extreme, this can be a bad battery or main system board.
by (Genius) (10.4m points)
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There is a higher current demand during a phone call than when the device is on standby.
asked Jun 11, 2020 in Other "please specify" by anonymous my phone switched on and off on it own

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