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How to downgrade Oneplus 9 and 9 Pro from OOS 12 to OOS 11?

  1. misiokicio
    Eclair Jan 23, 2022

    misiokicio , via OnePlus 9 Pro , Jan 23, 2022 :
    thank u, after weeks of wondering if i should give the colo os 12 a go, i finally did it yesterday and 2 hours later went back to oos11, I'll never try this crap again, absolutely a disgrace of what they done to a bloody best Android skin on the market.
     

    #81
  2. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022

    Caomhin , via OnePlus 9 Pro , Jan 23, 2022 :
    Personally updated to OOS 12 C38 and then updated to OOS 12 C44. Its fantastically stable, Camera software has improved immensely and the OOS 12 is rock solid. Works like a choo choo. Onwards and upwards with the Unified OOS/ColorOS. Happy days. 😎💪👍
     
    Last edited: Jan 23, 2022

    #82
  3. R1546149243224
    Cupcake Jan 23, 2022


    #83
  4. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022

    Caomhin , via OnePlus 9 Pro , Jan 23, 2022 :
    Did you use the Rollback file as linked in the Beta 1 thread in the original post at the top 🔝 of this thread. And also use the APK also link in the post. Read and follow the steps exactly and you will be able to downgrade.
     

    #84
    Shailender Sharma and Aaron2017 like this.
  5. R1546149243224
    Cupcake Jan 23, 2022

    R1546149243224 , via OnePlus 9 , Jan 23, 2022 :
    Yes.. same as stated... I dont like this 12 update... I downgrade anyhow.. pls help... This colour os is killed our best oxygen os... Oxygen os only the best one..
     

    #85
  6. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022

    Caomhin , via OnePlus 9 Pro , Jan 23, 2022 :
    As I already mentioned. Follow the steps precisely as mentioned in the original post at the top of this thread.
     

    #86
    Shailender Sharma and Aaron2017 like this.
  7. R1546149243224
    Cupcake Jan 23, 2022

    R1546149243224 , via OnePlus 9 , Jan 23, 2022 :
    I download the rollback once again and do as per your advice.. than tell you what hpnd..??
     

    #87
  8. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022

    Caomhin , via OnePlus 9 Pro , Jan 23, 2022 :
    I have used this method previously, as have many others and it does work as per the instructions given.

    What OOS build version are you currently on?
     

    #88
    Shailender Sharma and Aaron2017 like this.
  9. R1546149243224
    Cupcake Jan 23, 2022

    R1546149243224 , via OnePlus 9 , Jan 23, 2022 :
    12
     

    #89
  10. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022


    #90
    Aaron2017 and Shailender Sharma like this.
  11. R1546149243224
    Cupcake Jan 23, 2022


    #91
  12. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022


    #92
    Aaron2017 likes this.
  13. R1546149243224
    Cupcake Jan 23, 2022

    R1546149243224 , via OnePlus 9 , Jan 23, 2022 :
    Still not working
    1642948886185.jpg
     

    #93
  14. R1546149243224
    Cupcake Jan 23, 2022


    #94
  15. R1546149243224
    Cupcake Jan 23, 2022

    Attached Files:


    #95
  16. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 23, 2022


    #96
    Aaron2017 likes this.
  17. R1546149243224
    Cupcake Jan 23, 2022

    R1546149243224 , via OnePlus 9 , Jan 23, 2022 :
    I will try
     

    #97
    Caomhin likes this.
  18. O1642196387827
    Cupcake Jan 23, 2022

    O1642196387827 , via OnePlus 9 Pro , Jan 23, 2022 :
    Oneplus first thing 9 pro is just a waste of money
    when are we getting the perfect update of 12 version
    even the other companies like vivo less then 30k have provided the colour Os 12 update
     

    #98
  19. R1546149243224
    Cupcake Jan 24, 2022

    R1546149243224 , via OnePlus 9 , Jan 24, 2022 :
    Downgrade done.. thanks so much for your help..
     

    #99
    Caomhin likes this.
  20. Caomhin
    9 Series Expert, Participator of the Year Community Expert Jan 24, 2022


    Aaron2017 and Bobbie63 like this.