1. select db2020 model, any
2. on options mark "use server,user alternative security bypass"
if you want unlock - mark "unlock after flash"
if you want IMEI change - mark "patch otp/gdfs check, allow IMEI change"
3. back on semc tab
4. add to firmware corresponding MAIN,FSIMAGE,CUSTPACK (or script)
5. press FLASH
when asked, detach phone, remove battery, insert battery, attach phone.
i STRONGLY recommend you use DCU60 for that procedure,
cause CID52 security bypass on com/ufs require ~25 min,
while on DCU60 you need ~11mins
ps.
if you KNOW (hint: identify) main firmware version and only want
unlock/change IMEI, then you can reflash only main part of firmware.
Download Here:
http://*****************************/files/70938259/v0.914013.rar