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General AUIE - Oct 2021 | GALAXY S21 Ultra 5G | Official Firmware (SM-G998B) | 27th Sep 2021

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Senior Member
Sep 26, 2012
beirut lebanon
they are testing new one ui ..lol
i think September patch .
lets wait for fold 3 launch and see what one ui 3.1.1 or 3.5 , than s21 will get .
my opinion


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Aug 4, 2021
In this thread, you can discuss and share the Mega links of new firmwares (OFFICIAL STOCK) for the Galaxy S21 Ultra 5G!
NO CUSTOM ROM's and/or ROOT-talk

How to flash the firmware to your phone:

View attachment 5334455

1. Extract (un-rar) the firmware file (i.e. to folder C:\Odin) ***
2. Download Odin v3.14.4
3. Extract the Odin ZIP file (i.e. to folder C:\Odin)
4. Open Odin
5. Power OFF your S21 Ultra 5G
6. Reboot Phone in Download Mode: Connect USB-cable to your computer. Hold down "Volume up" and "Volume down" at same time. While holding down, connect the USB-cable to your phone. Or use the command "adb reboot-bootloader".
7. Wait until you get a blue sign in Odin
8. Add the firmware files to their designated slots (AP in AP, BL in BL, CP in CP, HOME_CSC in CSC). USERDATA stays EMPTY!
10. Click the start button, sit back and wait few minutes for the device to automatically restart.

*** You can always find the LATEST firmware in message #2

I have taken over these threads and they are dedicated to the memory of Henk, you can read more about him here:


Senior Member
Dec 3, 2020
The first thing I noticed is that Samsung Internet is so much smoother with this update.

No placebo effect, I was using it just before I updated.


Senior Member
Dec 3, 2020
Everything feels so much smoother, but that happens every time you wipe cache. Let's just hope this time it stays this way. Maybe it's too early to speak, but the phone got very hot after taking 2 pictures. This never happened before on my device.
I clear the cache quite often and never noticed this smoothness.

Let's hope that stays this way.

I am gonna take some pictures tonight and I'll let you know about the heating.

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