Use TWRP File Manager:
Don't forget to MOUNT SYSTEM AND VENDOR
1. Open /system_root/system/oppo , you'll se recovery_rootcheck and ck.fs inside, DELETE THEM.
2. Then there's another 2 of them in /vendor/oppo, DELETE them from there too.
3. Last but not least, delete recovery-from-boot.bak from /system_root/system
4. Enjoy your "new" phone!
Oh and btw it confirmed working for all ColorOS devices ?
Don't forget to MOUNT SYSTEM AND VENDOR
1. Open /system_root/system/oppo , you'll se recovery_rootcheck and ck.fs inside, DELETE THEM.
2. Then there's another 2 of them in /vendor/oppo, DELETE them from there too.
3. Last but not least, delete recovery-from-boot.bak from /system_root/system
4. Enjoy your "new" phone!
Oh and btw it confirmed working for all ColorOS devices ?