Flashing Instructions:
Download the necessary files from the post above and follow as below:
PS: Dirty flash is fine if you are running a previous OOS version or any Rom based on OOS, else if you come from a custom rom Clean Flash is recommended.
Caution: Please remove your existing screen lock/Pin/Pattern/ Password and set it to swipe before starting the update process. Although in my testing i was able to update fine keeping my pin but one user has reported unable to unlock after the Oreo update, thus remove as precaution.
************************ For Unlocked Users with TWRP Recovery Method 1************************
Download the required files from Post 2
Once you have downloaded all the required files on you device, please follow as below
1. Update TWRP to the latest blu/ibe recovery from the link posted
2. Reboot Recovery and Take a Nandroid of your existing ROM just in case you need it
3. Wipe > Advance Wipe > Select Dalvik & Cache > Swipe to Wipe
4. Install Menu > Select OOS Open Beta 3 Full Rom Zip > Swipe to Flash
5. Flash the provided Magisk V15 to maintain root (Optional) (DO NOT FLASH 15.1 AS IT LEADS TO BLACK SCREEN)
6. Wipe Dalvik & Cache
7. Reboot Recovery to make sure TWRP stays
8. Reboot System once recovery boots again.
9. Upon boot into OS > Magisk Manager > Update to 15.1 via app > Reboot > Profit
The Device will reboot and your OnePlus 5 is now running on the latest OxygenOS Open Beta 3 firmware & OS based on Android Oreo 8.0.
The first boot may take some so calm and wait for it to boot:fingers-crossed:
Reverting back to the Official OTA path/7.1.1 from the Beta path will require a full install and clean flash (FULL WIPE of all data and cache). Please be aware that all data will be wiped during the revert-back process, so do remember to backup your data in advance
