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Downgrade via OnePlus 7 Pro Nebula Blue


  1. #1
  2. Aaron2017
    General Support Expert Award 2021 Mar 30, 2021

    Best Answer

    #2
  3. Bobbie63
    Nougat Mar 30, 2021

    Bobbie63 , Mar 30, 2021 :
    also because you will lose all data anyhow downgrading, why not just try a factory reset first and set your phone up as new. Should You still have issues, you can always downgrade.
     

    #3
    the_o2, J4t1np4r3kh and Aaron2017 like this.
  4. Aaron2017
    General Support Expert Award 2021 Mar 30, 2021

    Aaron2017 , Mar 30, 2021 :
    Good point, hadn't thought of mentioning that.
     

    #4
    Bobbie63 likes this.
  5. Blazze
    Donut Mar 31, 2021


    #5
  6. Aaron2017
    General Support Expert Award 2021 Mar 31, 2021

    Aaron2017 , Mar 31, 2021 :
    When i click it it leads to the open beta 1 thread where he can find the rollback builds needed to flash first, otherwise he can't flash the OS10 version you linked.
     

    #6

  7. #7
  8. Aaron2017
    General Support Expert Award 2021 Apr 2, 2021

    Aaron2017 , Apr 2, 2021 :
    You'll have to use the rollback builds first if you want to downgrade. You'll find them in this link.
    https://forums.oneplus.com/threads/...or-the-oneplus-7t-and-oneplus-7t-pro.1379873/
    This will wipe out everything so back up first.
    After using the rollback build, just skip all the setup process and download the OS10 version again and install it via local upgrade
     

    #8
  9. asimsalam
    Donut Apr 2, 2021

    asimsalam , via OnePlus 7 Pro , Apr 2, 2021 :
    Can someone help me out how to downgrade to Android 10 stable from Android 11 stable on my Oneplus 7 Pro? I tried to download the downgrade file from the Beta Thread and removed the .jar and put it on my phone storage. When i try to do a local update it gives me an error. Anyone having this issue?
     

    #9
  10. Artemus
    Moderator, Community Hero 2020 Moderator Apr 3, 2021

    Artemus , Apr 3, 2021 :
    This is quite literally spelled out for you in the above post.
     

    #10
    Aaron2017 likes this.
  11. asimsalam
    Donut Apr 3, 2021


    #11
  12. Artemus
    Moderator, Community Hero 2020 Moderator Apr 3, 2021

    Artemus , Apr 3, 2021 :
    What is the error message?
     

    #12
    Aaron2017 likes this.
  13. asimsalam
    Donut Apr 3, 2021


    #13
  14. znaj
    Eclair Apr 4, 2021

    znaj , Apr 4, 2021 :
    Got the same answer.

    Some idiot recommended the same procedure without testing it first.
    I ended up bricking my 7Pro and 1+ no longer provide full fastboot images to restore my phone.

    It says "System Update installation failed"[/QUOTE]

    It is important to go back to Android 9 first. I finally succeded in unbricking using MSM Tool All in One after disabling Win 10 driver signing check and reinstalling 1+ USB drivers.
    You will need fastboot zip files. (Google Tool All in One / Fastboot oneplus files)

    Downloading OOS 10 from 1+ support and doing local upgrade upgraded my phone.
    Now I am finally running OOS 10 again and having backed up before fiddling and restored using OS Switch I am happy again.
     
    Last edited: Apr 6, 2021

    #14