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How to downgrade step by step Oneplus 7(pro) to 10.3.8(7)?

  1. DanFromNorway
    Cupcake Jul 30, 2021

    DanFromNorway , Jul 30, 2021 :
    Hello, can anyone tell a newbie how to downgrade Oneplus step by step from 11.02.1.GM21BA Modell GM1913?
    Non rooted phone. I tried but only got an error in the beginning while installing 10.3.8 locally. Nothing about why it gives an error, and only quits the installing process.

    Can the error be that i used a Global version instead of EU version?
     
    Last edited: Jul 30, 2021

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    nizamsyed786 likes this.
  2. Artemus.
    Community Hero 2020 Jul 30, 2021


    #2
    Aaron2017 likes this.
  3. DanFromNorway
    Cupcake Jul 30, 2021


    #3
    Primete likes this.
  4. DanFromNorway
    Cupcake Jul 30, 2021

    Last edited: Jul 30, 2021

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  5. nizamsyed786
    Gingerbread Aug 20, 2021


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  6. MZT_01
    Cupcake Aug 24, 2021

    MZT_01 , Aug 24, 2021 :
    Did it work?
     

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