Download the latest FW files from here
- Install TWRP (OnePlus 5) and Magisk if you don't have them yet.
- Magisk should allow you to slide "OEM unlocking" to "enabled" in developer settings (THIS IS IMPORTANT)
- Reboot to fastboot (Refer to my older post if you do not know)
- Flash stock recovery via fastboot. (Refer to my older post if you do not know)
- Run locking via fastboot flashing lock command
- Allow it to reboot and upon start up it will say device corrupted (THIS IS NORMAL)
- Boot to recovery via the warning start screen.
- Once in recovery, sideload latest FW.
- Done & have profit.
