How to downgrade samsung galaxy s8 from android 9 to 7

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alfredFR63

Member
Apr 12, 2021
6
1
Hello everyone,

I have S8 (SM-G950F) on android 9 with (1.0) One UI Version and I want to downgrade to android 7 (Nougat)
First question :
Can I downgrade android 9 to 7 directly or downgrade 9 to 8 before, and 8 to 7.
Second question :
How to select a correctly build number on https://www.sammobile.com/samsung/galaxy-s8/firmware/SM-G950F/XEF/#SM-G950F to flash firmware.
My build number is PPR1.1806610.011.G950FXXSBDUA3

Thank you.
 

Arc android

Senior Member
  • Hello everyone,

    I have S8 (SM-G950F) on android 9 with (1.0) One UI Version and I want to downgrade to android 7 (Nougat)
    First question :
    Can I downgrade android 9 to 7 directly or downgrade 9 to 8 before, and 8 to 7.
    Second question :
    How to select a correctly build number on https://www.sammobile.com/samsung/galaxy-s8/firmware/SM-G950F/XEF/#SM-G950F to flash firmware.
    My build number is PPR1.1806610.011.G950FXXSBDUA3

    Thank you.
    Hey there !! You want official firmware right ? If so you'll have to downgrade it via Odin. You can downgrade it directly from android 9 to 7. Build number doesn't matter here. The build number you have given here must be of android 9. Just select this version of android 7 ( if you want latest ) the one in yellow :

    Screenshot_20210412-184718.png
     
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    alfredFR63

    Member
    Apr 12, 2021
    6
    1
    Thank you Arc android for the reply.
    Yes, I want official firmware and downgrade via Odin. I thought we had to use only the same bootloader version. I was afraid to block my phone.
    I will try it, thank you so much.
     

    alfredFR63

    Member
    Apr 12, 2021
    6
    1
    Any success brother ??????
    Hi bro,
    My computer had a problem during this past time :).
    I can't download the official firmware from https://www.sammobile.com/firmwares/ I must be premium.
    Althought, I found the firwmare on https://samfw.com/firmware/SM-G950F/XEF/G950FXXU1AQK7
    But Concerning BIT (or SW REV) they say that:
    "Samsung do not allows you flash lower SW. REV. for your phone. Do not try if you do not want your phone bricked"
    (https://samfw.com/blog/what-is-bit-binary-value)

    What do you think about this ?
     

    Arc android

    Senior Member
  • Hi bro,
    My computer had a problem during this past time :).
    I can't download the official firmware from https://www.sammobile.com/firmwares/ I must be premium.
    Althought, I found the firwmare on https://samfw.com/firmware/SM-G950F/XEF/G950FXXU1AQK7
    But Concerning BIT (or SW REV) they say that:
    "Samsung do not allows you flash lower SW. REV. for your phone. Do not try if you do not want your phone bricked"
    (https://samfw.com/blog/what-is-bit-binary-value)

    What do you think about this ?
    Hey brother. I am absolutely sorry but I can't help you about this. You see, I don't have a PC so I don't know any troubleshooting that might help. I have a Samsung galaxy tab 2 but I only use custom ROMs on it ( if I ever feel like reverting to stock, I use the stock-custom ROMs ) so I don't know. SORRY !!!
     
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