DerpFest Flashing Instructions for Oneplus 13R/Ace 5

Disclaimers:

Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about the features included in this ROM before flashing it! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.
Dirty flash at your own risk. In case of a bootloop, try flashing the previous build.
Always back up your data. No one but you is responsible for keeping your data safe.
This ROM ships with OOS 16.0.3.500 firmware. Make sure to NOT flash any other ROM with firmware older than 16.0.3.500 after flashing this build, or else you could risk bricking your device

Using the ROM's recovery

Clean Flash (coming from another ROM)

1) Enter bootloader mode by pressing and holding the Power + Volume Down buttons, and plug your device to your PC when it boots. Then open a terminal on your platform tools folder and flash the following files:

fastboot flash boot boot.img

fastboot flash dtbo dtbo.img

fastboot flash init_boot init_boot.img

fastboot flash vendor_boot vendor_boot.img

Tip: You can just drag and drop the downloaded .img file into your terminal

2) Reboot to bootloader mode by typing:

fastboot reboot bootloader

3) Flash the ROM's recovery onto your device by typing:

fastboot flash recovery recovery.img

4) Now reboot into recovery to verify the installation. Use the volume buttons and the menu to navigate and to select the "Recovery" option, then press the power button to select it.

5) Download the latest DerpFest zip file for your device here: 13R | Ace 5

6) While in the recovery, select "Factory Reset", then "Format data" and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage

7) Return to the main menu

8) Select "Apply update", then "Apply from ADB". Then type on your PC:

adb sideload ROM.zip

Note: Replace "ROM" with the name of the zip file you downloaded for your device, or just drag and drop the file.

9) Reboot to system

Dirty Flash (updating your current DerpFest installation)

1) Reboot to recovery

2) Select "Apply update", then "Apply from ADB". Then type on your PC: