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My mobile phone doesn't respond
This troubleshooting guide will take you through a number of possible causes
to help you find a solution to your problem.
Restart your mobile phone.
Possible cause 1:
There's an error in the operating system on your mobile phone
Solution:
Restart your mobile phone
Tap the Side key.
At the same time, tap and hold the lower part of the Volume key and keep them both tapped until your mobile phone restarts.