Galaxy S21 SM-G991B U3 Firmware – Android 11 R

Galaxy S21 SM-G991B Binary 3 Firmware

Galaxy S21 SM-G991B U3 Firmware – Android 11 R

Galaxy S21 SM-G991B Binary 3 Firmware

The specific Galaxy S21 SM-G991B U3 Firmware Download Package comes with a Stock ROM of Galaxy S21 SM-G991B U3 Security Patch Level 2021-12-01 (1 December 2021). This helps you to bypass the FRP lock and revert from the root and custom ROM.

Samsung Galaxy S21 SM-G991B Binary 3 Android 11 R Brazil ZTO – G991BXXU3AUHB

There are various reasons to flash “Stock Firmware on Galaxy S21 SM-G991B U3“. For instance, if your phone gets stuck on the logo and you need to remove the FRP lock from it.

The Advantages Of Stock ROM:

  • Fix boot loop issue
  • Update and Downgrade
  • Unroot or Fix Bugs
  • To solve the lag or stutter
  • Fix software issues.
  • Revert to stock firmware

Pre-requirements:

Galaxy S21 SM-G991B U3 Stock ROM Details:

SM-G991B U3 Brazil ZTO – G991BXXU3AUHB:

Advertisements
Model SM-G991B Binary 3 U3, S3, Bit 3
Region / Country Brazil
Language Multi-Language
Android version Android 11 R
Operator / Carrier Clean ZTO (no logo, carrier apps)
PDA G991BXXU3AUHB
CSC G991BOWO3AUHB
product code ZTO
Build Date 2021-08-19
Security Patch Level 2021-08-01 (August 1, 2021)
Size 6.3 GB
Download Google Drive Android File Host
SM-G991B U3 Brazil ZTO – G991BXXU3AUIE:
Model SM-G991B Binary 3 U3, S3, Bit 3
Region / Country Brazil
Language Multi-Language
Android version Android 11 R
Operator / Carrier Clean ZTO (no logo, carrier apps)
PDA G991BXXU3AUIE
CSC G991BOWO3AUIF
MODEM CP Version G991BXXU3AUIF
product code ZTO
Build Date 13 Sep 2021
Security Patch Level 2021-10-01 (October 1, 2021)
Size 6.3 GB
Download Android File Host

Stock ROM (SM-G991B) Full Firmware All File Fix Samsung S21 5G

PDA Android Size
G991BXXU3BUK8-G991BOXM3BUK8-XXV 11 6,4G
G991BXXS3AUJ7-G991BOXM3AUIE-XXV 12 6,4G
G991BXXU3AUDA-G991BOXM3AUDA-XSG 11 6,4G
SM-G991B U3 Brazil ZTO G991BXXU3BUKG:
Model SM-G991B Binary 3 U3, S3, Bit 3
Region / Country Brazil
Language Multi-Language
Android version Android 12
Operator / Carrier Clean ZTO (no logo, carrier apps)
PDA G991BXXU3BUKG
CSC G991BOWO3BUKG
MODEM CP Version G991BXXU3BUKG
product code ZTO
Build Date Tue, 23 Nov 2021
Security Patch Level 2021-11-01 (November 1, 2021)
Size 6.4 GB
Download Google Drive Android File Host

SM-G991B U3 Brazil ZTO G991BXXS3BULC:
Model SM-G991B Binary 3 U3, S3, Bit 3
Region / Country Brazil
Language Multi-Language
Android version Android 12
Operator / Carrier Clean ZTO (no logo, carrier apps)
PDA G991BXXS3BULC
CSC G991BOWO3BUKG
MODEM CP Version G991BXXU3BULA
product code ZTO
Build Date 2021-12-28
Security Patch Level 2021-12-01 (1 December 2021)
Size 6.4 GB

How To Install Galaxy S21 SM-G991B U3 Stock Firmware:

1: Download and Install the Samsung USB Driver on your computer.

2: Download and extract the Galaxy S21 SM-G991B U3 Firmware files on your computer.

3: Now, Switch off your Smartphone.

Advertisements

4: Boot into Download Mode.

Press and hold Volume Down, Home and Power button at the same time for 5-8 seconds until download mode is active.

5: In Download mode, a Warning Yellow Triangle Sign will appear. simply press the Volume Up key.

6: Open Odin. Then, connect your phone to the pc.

Advertisements

7: Odin will detect the device and show the “Added message in the lower-left panel.”.

8: Once Odin detects your device, click on the PDA button and select the Firmware.tar file.

9: Click the Start button in Odin to begin the Flashing.

10: Flashing usually takes 30-50 seconds to complete the process on your Phone.

Advertisements

Once the Firmware process is completed, you will be able to see a Green Box with Pass written on it in Odin. During this process, the Smartphone will reboot automatically.

Once you spot the “Pass” message in Odin, you can unplug your device from the computer.

When your Galaxy S21 SM-G991B U3 finally boots up, you should now be running your desired firmware.

To verify the installed firmware, go to Settings –> About Phone –> Software Information. Check the firmware number under “Baseband version.”

Advertisements

Disclaimer:

  • Read and understand the Full Guide before flashing.”Galaxy S21 SM-G991B U3 Firmware.
  • Use these instructions at your own risk. We will not be responsible for everything that happens to your device resulting from the use of the information in this guide.
  • Phone must have a 70–80% charge.

Always had a strong interest in the Android operating system. Experience with Git and self-hosted WordPress blogs led him to the understanding that an online presence was the logical next step for his business. It's about uniqueness and individuality!
Back To Top