Flash instructions for OnePlus 8T/9R

Download Havoc-OS Fastboot Rominstaller from here

https://forum.xda-developers.com/attachments/havoc-os-fastboot-rominstaller-zip.5408633/

1. Havoc-OS Fastboot ROMinstaller ( These zip inciude both payload_dumper and fastboot_installer ) and extract zip in pc​

2. Copy the playload.bin file from Rom.zip file to payload_dumper >> payload_input folder​

3. Now Run payload_dumper.exe​

4. Wait for extractions

5. After extracting completes, go to payload_output folder and copy all the images files to the fastboot_installer folder​

6. Now connect your device to pc​

7. Reboot your device into fastboot mode​

8. Now Run ROMinstaller.exe​

9. It's reboot your device into fastbootd mode​

10. Wait for all images flashing completes​

11. Now select recovery mode​

12. Do factory reset your device ( Not required if updating rom )​

13. If you want to use magisk then do adb sideload < Zip Name>.zip via adb sideload ( optional )​

14. Reboot to System.