how to repair GDFS of sony mobile

how to repair GDFS of sony mobile
1. Go to emptyboard fill & repair tab
2. Select correct model
3. Strictly use either COM or UFS as interface
4. Press tp stage #1 (if you done it, skip it)
5. Execute instructions
6. Press tp stage #2 when step 5 successfull
7. STAY ON EMPTYBOARD FILL & REPAIR TAB
8. Add to firmware area respective GDFS
9. Add to firmware area correct EROM "EROM CID>=OTP CID"
10.Press flash.
11.Phone repaired.