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How to downgrade tp oxygen os 11 from 12 i don't find the rom for OnePlus 9 pro global room via OnePlus 9 Pro

  1. Thenoname
    Froyo Jan 1, 2022


    #1
  2. hbk1402
    Beta Tester of the Year Award 2021 Jan 2, 2022


    #2
    itsvamshi and Caomhin like this.
  3. Swejuggalo
    OnePlus 9 Series Expert Community Expert Jan 2, 2022


    #3
    Caomhin likes this.
  4. H1643355087517
    Cupcake Jan 28, 2022


    #4
  5. Bobbie63
    Nougat Jan 28, 2022

    Bobbie63 , Jan 28, 2022 :
    Don't know where you got that beta 12 from, maybe they site where you got it from can tell you.

    As far as I know no official open beta has been released by OnePlus and should you have joined closed beta, well the forums isn't the place to be.
     

    #5
    Aaron2017 likes this.
  6. H1643355087517
    Cupcake Jan 28, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 28, 2022 :
    I purchase this phone from a secondhand shop. And this is the CN version but I live in Malaysia. I have search everywhere but couldn't find the solutions. please help me
     

    #6
  7. Swejuggalo
    OnePlus 9 Series Expert Community Expert Jan 28, 2022

    Swejuggalo , Jan 28, 2022 :
    Without a downgrade zip you need the MSM-tool for your phone. But since it's a Chinese version it may be trickier.
     

    #7
  8. H1643355087517
    Cupcake Jan 28, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 28, 2022 :
    What is MSM tools? Can you guide me? I think eventho its chinese version its flashed with global rom
     

    #8
  9. Aaron2017
    General Support Expert Award 2021 Jan 28, 2022

    Aaron2017 , Jan 28, 2022 :
    Just to be clear here, are you on open beta 12 based on Oxygen OS 11 or on a beta of OxygenOS 12? What version do you exactly have?
     

    #9
    Bobbie63 likes this.
  10. H1643355087517
    Cupcake Jan 28, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 28, 2022 :
    I'm on android 11,
    The build no is OP8Pro_O2_Beta_12
     

    #10
  11. Aaron2017
    General Support Expert Award 2021 Jan 28, 2022

    Aaron2017 , Jan 28, 2022 :
    Ah, in that case you can follow the instructions and use the rollback links from the last open beta thread here to switch to the stable channel
    https://forums.oneplus.com/threads/...eplus-8-pro-oxygenos-11-open-beta-12.1474362/
    Or download the latest full stable update from an external source, and try installing that over your beta version via local upgrade.
    But back up all your data first because both ways will wipe the data from the phone
     

    #11
    Bobbie63 likes this.
  12. H1643355087517
    Cupcake Jan 28, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 28, 2022 :
    So since i'm using the CN variant, i shall download the global or EU file am i right?
     

    #12
  13. Aaron2017
    General Support Expert Award 2021 Jan 29, 2022

    Aaron2017 , Jan 29, 2022 :
    I think global since you're living in Malaysia. But to be sure you could wait to see what @Swejuggalo knows about that when he sees your messages here.
     

    #13
    Bobbie63 likes this.
  14. H1643355087517
    Cupcake Jan 29, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 29, 2022 :
    I downloaded the file but still couldnt see in the local package update from the setting
     

    #14
  15. H1643355087517
    Cupcake Jan 29, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 29, 2022 :
    Solved. From your link i scroll all the way to XDA they mention to download oneplus updater. Now im back at oxygen os 11. THANK YOU
     

    #15
  16. Aaron2017
    General Support Expert Award 2021 Jan 29, 2022

    Aaron2017 , Jan 29, 2022 :
    Ah, great. You're welcome 👍
     

    #16
    Bobbie63 likes this.
  17. H1643355087517
    Cupcake Jan 29, 2022


    #17
  18. Aaron2017
    General Support Expert Award 2021 Jan 29, 2022

    Aaron2017 , Jan 29, 2022 :
    For now this is normal since you've only did an update just now. Allow the system some time and some full charging cycles to let it optimize itself and observe how it behaves after that. There are a couple of useful battery threads out there as well, for now i'll link just the one that explains things pretty well.
    https://forums.oneplus.com/threads/battery-analysis-and-battery-drain-trouble-solving.1413430/
     

    #18
    Bobbie63 likes this.
  19. H1643355087517
    Cupcake Jan 29, 2022

    H1643355087517 , via OnePlus 8 Pro , Jan 29, 2022 :
    Thanks! Will take a read once im home. Anyway do you root your device? If so can you share the most complete procedure if any? Last time i root an android was during gingerbread os
     

    #19
  20. Aaron2017
    General Support Expert Award 2021 Jan 29, 2022

    Aaron2017 , Jan 29, 2022 :
    You're welcome 👍
    No, That's something i don't have any experience with, sorry. But i suspect the user i tagged in one of my comments above does and maybe he will be able to help you with that
     

    #20
    Bobbie63 likes this.