How to repair reboot/restart/freeze with SIM card step-by-step instruction

"ChineseMiracle": How to repair "reboot/restart/freeze with SIM card"


1. make full flash backup for emergency case (use 921000 speed for fast operation)
2. select "safe" format method
3. make "format ffs"
4. remove/install battery
5. press and hold phone "Power" button during 30-40 sec to make phone Powered-On
if phone Ok go to step-6

if phone still in reboot/restart/freez state: select "complete" format method and go to step 3
if phone can't Power-On: restore original flash backup
if you don't have original backup: write different firmware files with firmware version similar to original (make ask/rpl if need)

6. restore original imei
7. if phone has touchscreen LCD make calibration: click to LCD corners one by one

if still no luck: check phone hardware