Hello Everyone
i Have Faced This Problem
This Is No Firmware(software) And EFS Problem, This Os Hardware PCB Problem
When Me Try All Of Tricks Me Found solution Temprory But Solve The Problem
and Not A Power Swotch Or Mem. Card Fault
The Power Ic REBALL needed For Permentent Solution Or Replace With New
And Without Replace or reball I Have Solve This Peoblem
1. Remove top Side 3 Scru By Scru driver
And Use Handsend
its May Delay of the time shutdown
my expiroance when me using without scruw its fix some time gose $@$* down like 15 to 20 day after and its 1 time but no longer shutdown in the month 1 to 2 time just shutdown
try this solution
and 2nd some of the mobile not power ic fault its caused by front camera and proxy sensor fault
so try 1 method if not sucsses try 2nd method Good Luck