How to Install LineageOS 21 Android 14 on OnePlus 9 Pro

In this video, we will show you the steps to install the latest LineageOS ROM based on Android 14 onto OnePlus 9 and OnePlus 9 Pro devices. Do note that you’ll have to be on the OxygenOS 13 firmware before flashing this ROM [the process to do the downgrade from OxygenOS 14 to 13 has been explained in the video]. 00:00 Android SDK Platform Tools 00:30 Enable USB Debugging and OEM Unlock 01:50 Unlock Bootloader 02:21 Download LineageOS 21 for OnePlus 9/Pro 04:52 Boot to Fastboot Mode 05: 49 Downgrade to Android 13/OxygenOS 13 08:39 Flash LineageOS 21 Recovery 10:00 Format Data 10:30 Sideload LineageOS 21 ROM 11:31 Flash GApps [Optional] 14:23 Check out LineageOS 21 on OnePlus 9/Pro