How To Install Kingstar A20 Official Fimrware & How To Solved Pattern Lock hang Problem Solution Guide

 Kingstar A20 Flashing Tutorial Without Any Device 100% Worked 

No need of full flashing i m posting here shortest solution for A20 hard reset/pattern Unlock
or wiping
keep flash file folder any whre you wish
Broadcom driver must be installed
I had placed flash file pack in c: drive rename folder as "a20 file"

Go to start > run > cmd
Now type following>>>>


C:\>cd a20file
C:\a20 file>dfu
now press Enter
Window will pop up saying plug in device
now plug in handset without battery or with battery keeping in mind port "Broadcom usb to serial" is formed , keep device manager opened

within a minute set is reset
wiping all user maintained data ,security or pattern lock

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