Do you shut up your mobile phone when you go to bed at night?

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For myself,I shut up the mobile phone almost everyday,except there is emergency or waiting for someone's call.I formed this habit when I owned my first mobile phone as a student,now I still keep this habit.Once read an article said that one boy loves a girl,and he never shut up his mobile phone at night,so that the girl can call him at anytime when she suffers an emergency or falls sick suddenly,the boy never tell the girl about this,even when the girl always asks the boy why he never shut up his mobile phone at night,she thinks putting the mobile phone under the pillow without shutting it up is bad for the the health of the boy, but the boy just smiles without saying one word every time.What a heart-warming story,right? But I will keep my habit,I need to take the responsibility of my health,and my friends know my habit,they obey it except there is an emergency.And what about you?Welcome to share.