Forum Discussion
How to flash back to OS11 on T-Mobile OnePlus 9 Pro (or any OP phone).
I had updated to OS12 on my OP9 Pro and I hated it. There are now too many useless features, not to mention a few of my most used features disappeared (such as the seconds on my clock in the notification bar, and the quick features by long pressing HOME, RECENTS, & BACK buttons.) So I used the MSM Download Toolkit to flash back to OS11, and I am going to use 11 until T-Mo releases 13.
Here is the complete list of OP devices and their respective MSM Download Toolkit(s) associated with them. *Remember to always use the toolkit for YOUR device model - for they are not interchangeable. You will get a failed result EVERY TIME.* This also works for BRICKED OnePlus devices.
https://onepluscommunityserver.com/list/Unbrick_Tools/
For the specific T-Mo OP9 Pro device, I have the ZIP file available to download along with step-by-step instructions on how to Flash Back to Android 11 on OP9 Pro - inside of my Google Drive folder :
https://drive.google.com/drive/folders/1PbVwsUqW8Zh1sJLgl4Uf-YMkzvr8PJt8?usp=sharing
Thank you for posting! This is what I needed to reset my OnePlus 9 Pro - Android 12 broke a lot of things, most importantly for me was Google Voice calling…
1 step I ran into that needed to be done, once I got my phone in EDL mode, Windows didn't have the correct drivers. It appears as QHUSB_BULK and needed to be: QDLOADER 9008
I followed instructions in the FAQ section on this page to update my Windows drivers to correctly recognize the device. Then the remaining steps were easy.
Never mind, got the file(s).
(original post) Page won't load. Backed out to base URL, still won't load.
crazy to see how many people are still foaming at the mouth about not getting 12 yet are seeing all the results of how bad it was for everyone posted all over the place in here.
