I want to downgrade my m3 note

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5

2018-07-07 05:15

I want to downgrade my m3 note fromFlyme 7.8.6.25 beta to 6.3.0.0G ..Is it safe??There are a lot of bugs in this room .like battery dran.heating issue.and google loging problem.So badly need my previous rom.is it safe to downgradge.help me pls.is there any brick issue ??model M681h.