Tested on c2 old ad688g (no front cam)
It’s kitkat phone, but gave pain i the ass..
Downgrade
- extract AD688G-SW-E952KK.4.01.06.ID11.rar
- place in sdcard
- turn off phone
- press 3 button (vol up + down + power)
- wait until finsh
ROOT
root using kingoroot, whatever…
TWRP
- Instal Flashify
- Flash Philz_CWM.img