how to enter into demo mode on android | how to enable demo mode

how to enter into demo mode on android | how to enable demo mode
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[@thatboyshane]

Explain everything what demo mode rlly does tho

[@user-wt7sf8jj8b]

It do is get your phone to 100% again but mine don't work :c

[@user-fj3du8fv8w]

Dose the phon brok?