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How to downgrade OnePlus 6t from Android 10 back to Android 9 via OnePlus 6T

  1. Paccman
    Froyo Nov 5, 2019

    Paccman , via OnePlus 6T , Nov 5, 2019 :
    I am sorry if the information is available elsewhere, I did try to search first.

    I am not happy with the update to A10 (too many things to mention) and really need to get back to A9.

    When I downloaded the zip file for A9, my phone did not like it and informed me that "the version of the selected package is lower than that of the current system,.."

    Is there a way to revert back to A9? My phone is not rooted and the model is A6013.

    Help please and thank you
     

    #1
  2. Kytharsis
    Nougat Nov 6, 2019

    Kytharsis , Nov 6, 2019 :
    You have to download the rollback ROM.
     

    #2
    Bilalazeem54 likes this.
  3. Paccman
    Froyo Nov 6, 2019


    #3
  4. F_Chandradip_Mukherjee_m
    Gingerbread Nov 6, 2019

  5. Last edited: Nov 13, 2019

    #5
  6. Abilash93
    Cupcake Nov 20, 2019


    #6
  7. Paccman
    Froyo Dec 4, 2019

    Paccman , via OnePlus 6T , Dec 4, 2019 :


    Abilash93

    hlo, any problem after the downgrade ?​


    Everything running as normal, some aps were crashing after installing the backup I made, so I just uninstalled the app and reinstalled from the Play Store. Now have no problems and the Bluetooth working great in the car.
     

    #7
  8. Abilash93
    Cupcake Dec 4, 2019

    Abilash93 , Dec 4, 2019 :
    ok thanks for your reply, mentioned file for downgrade isn't working on my OnePlus 6t . can't exract the file means can't open from the zip file . what to do please reply . Still struggling with the 10 beta version so many problems .
     

    #8
  9. Paccman
    Froyo Dec 4, 2019

    Paccman , via OnePlus 6T , Dec 4, 2019 :
    Abilash93

    ok thanks for your reply, mentioned file for downgrade isn't working on my OnePlus 6t . can't exract the file means can't open from the zip file . what to do please reply . Still struggling with the 10 beta version so many problems .



    https://forums.oneplus.com/threads/...q-to-android-9-0-pie-on-oneplus-6-6t.1134519/

    This will explain all, You don't extract the file

    Edit: You will need to remove the ".jar" at the end of the file name, you will be left with a file ending in ".zip"
     
    Last edited: Dec 4, 2019

    #9
  10. AbdulHananTaha
    Donut Feb 25, 2020


    #10
  11. Kytharsis
    Nougat Feb 25, 2020

    Kytharsis , Feb 25, 2020 :
    Don't use the Community app, open it in a full browser.
     

    #11
    Caomhin likes this.
  12. AbdulHananTaha
    Donut Feb 25, 2020

    AbdulHananTaha , via OnePlus 6T , Feb 25, 2020 :
    thanks it's downloading now.
    one more thing do I need to double check my backups or data won't be wiped?
     

    #12
  13. Kytharsis
    Nougat Feb 25, 2020

    Kytharsis , Feb 25, 2020 :
    This specific build will wipe your phone as it's meant to.
     

    #13
    Caomhin and ironass like this.
  14. G1582781020678
    Cupcake Feb 27, 2020

    G1582781020678 , Feb 27, 2020 :
    I have also tried but the installation fails at 68%. When I go back to Local Upgrade to retry, it just has it stuck there and says it failed, preventing me from retrying...

    What else should I do? Factory reset and try again?
     
    Last edited: Feb 27, 2020

    #14
  15. Caomhin
    KitKat Feb 27, 2020

    Caomhin , via OnePlus 6T , Feb 27, 2020 :
    Downgrade Android 10 to Android 9 check @ironass post link below

    https://forums.oneplus.com/threads/...eplus-6-and-6t.1174291/page-193#post-21315967

    The above links DO work. If you cannot open them using the OnePlus Community app, switch to your Google Chrome browser
     

    #15
    Kytharsis likes this.
  16. G1582781020678
    Cupcake Feb 27, 2020

    G1582781020678 , Feb 27, 2020 :
    WHat I'm saying is I have tried that, downloaded it and my installation fails.

    SO TELLING PEOPLE THAT THINGS THAT HAVENT WORKED FOR THEM DO WORK IS COMPLETELY UNHELPFUL!!!
     

    #16