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I have Samsung Galaxy A10s (SM-A107F). In the summer I updated to Android 11 (current firmware is A107FXXS8CVK1, SEK region). Now I want to roll back to Android 10, but I don’t have a computer, root and TWRP. Is it possible, for example, to download the firmware from here (version A107FXXS8BUC1, SEK region) and install it via Apply update from SD card in stock Recovery? And will I lose data on the phone or on the memory card, or both?


UPD: I want to downgrade because in Android 11 there is no access to some folders due to Scoped Storage.


UPD: I also want to downgrade because I liked One Ui 2 better.

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  • Can you please tell us why you want to downgrade so we better understand the issue?
    – zomega
    Apr 8, 2023 at 9:13
  • @zomega I want to downgrade because in Android 11 there is no access to some folders due to scoped storage
    – Pushistik
    Apr 8, 2023 at 10:36
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    There is a new permission called MANAGE_EXTERNAL_STORAGE on Android 11 so apps can still access the external storage. See this screenshot imgur.com/a/P1PJnCP A good file explorer supports this. So you can still access all files as before Android 11. If this doesn't help you, you can root your phone which gives you access to all files (even system files for example). Good file explorers support root access. Downgrading is not a good idea in this case as it doesn't seem to be necessary.
    – zomega
    Apr 8, 2023 at 11:15
  • @zomega I still want to downgrade. I liked One Ui 2 better.
    – Pushistik
    Apr 8, 2023 at 11:26

1 Answer 1

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There are drawbacks when you downgrade:

  • you will loose security updates
  • firmwares from the internet can contain viruses
  • you will loose all data (downgrade performs factory reset)
  • if something goes wrong your phone is bricked
  • There will be a warning screen on boot which tells the user that you modified the firmware. This warning cannot be removed once you enabled OEM unlocking. When you sell your phone you will get less money because of this warning. (Update: It's possible that flashing official firmware does not enable this warning. Also see comments.)

If you still want to downgrade you have to do it on your own risk:

  1. backup all your data
  2. enable developer settings
  3. enable OEM unlocking in the developer settings
  4. boot into download mode
  5. start the tool Odin on your PC
  6. flash firmware

I don't have the time to write a detailed tutorial but you can find many guides on the internet. One can be found here. Simply search for "Samsung flash odin" on the web.

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    In your list of negative consequence the "Knox flag is permanently triggered". This means certain Kox based function will no longer work (mostly in an MDM context).
    – Robert
    Apr 8, 2023 at 14:13
  • @Robert I've read if you load a non-Knox kernel the knox bit is triggered. Does this mean flashing official firmware (which have knox kernels) don't trigger the knox bit? docs.samsungknox.com/admin/knox-platform-for-enterprise/faqs/…
    – zomega
    Apr 8, 2023 at 14:56
  • In my understanding Knox bit should not be triggered by official firmware. But there should be downgrade protection so the number of possible firmware you can install should be very limited. But I have to admit that I don't have practical experience on that field as I have many Samsung devices.
    – Robert
    Apr 8, 2023 at 20:34

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