Anyone successful installing Touch (16.04) on Oneplus 6T Oxygen 10?

[rbhawk]

Believe I read that the Oneplus installation for the 6T is recommended to be
with a device that is running Oxygen 9??? Please correct me if I am wrong.

Also, anyone successful in deleting Oxygen 10 and installing the 9 revision on the 6T to accommodate the installing of Touch??

[portu51]

@rbhawk yes,you install Oxygen 9 to after can install UT.

[sven]

@portu51 The question from @rbhawk, me, and others is: How to install OxygenOS 9? I sent one device to OnePlus and they refused to downgrade ("not possible", haha).

[Reynald]

@rbhawk I managed to install then stock Android/Oxygen 9.0.8 with MSM Download in EDL mode (lowest hardware recovery mode) with this tutorial : https://www.thecustomdroid.com/oneplus-6-6t-unbrick-guide/

To start the 6 or 6T in EDL mode, set off the device and plug the USB while pressing volume + and -

The only caveat is... MSM Download runs on Windows.

[kopap]

You can use the roll back zip from here : https://forum.xda-developers.com/t/guide-rollback-downgrade-from-oos-android-10-q-to-stable-9-pie.4000645/

you can flash the file from the oxygen update app or twrp. if you flash oos 9 from twrp on both slots twrp will not work ,you will need a twrp compatible with android 9 bootloader

[SevralT]

@rbhawk It is impossible to install Ubuntu Touch on OxygenOS 10 base, because we are using OxygenOS 9 based kernel. You can just flash OxygenOS 9 to both slots and then, flash Ubuntu Touch.

[portu51]

@sven https://forum.xda-developers.com/t/op6t-latest-10-3-8-collection-of-unbrick-tools.3914746/ open this page download the oxigen 9 and the tool,is very easy,but you must do this with windows