Samsung has rolled out a new Android 11 update with G991U1UEU4AUGQ firmware for Galaxy S21 SM-G991U1 in the USA. The update brings enhancements and features that would improve usability. The users who have rooted their device by any means can update their device now manually through Odin process to getting back to its original stock ware. Download the files and update it now.
Caution
Make sure to cross-check the Name and model of your Smartphone before starting the update since it’s only meant for the said device. Using the firmware on other handsets might brick your handset or even create bugs in it. We at our site will never be blamed for any sort of issues or bugs if created in your device because of this update. So what you do is at your own risk.
Also Read: Tutorial To Update Galaxy S21 SM-G991B With G991BXXU3AUE1 FIRMWARE In India
Pre-requisites
- Samsung Galaxy S21 SM-G991U1
- Original USB Cable
- Enable USB Debugging Mode. You will find the option in the Developer Section of your device. By pressing the built number for 7 time
- Back-Up all important data in your Smartphone since the update will erase all your data.
- Keep at least 70% battery back up on your Galaxy S21 SM-G991U1 to avoid accidental shut down during installation.
- Make sure you install the latest firmware on SM-G991U1 model only
- Make sure, the SAMSUNG-drivers are installed on your PC
- Download Odin3-v3.14.4.zip file keep in PC
- Download Android 11 G991U1UEU4AUGQ Firmware keep in PC ATT
Tutorial to Update on Galaxy S21 SM-G991U1
- Download Android 11 G991U1UEU4AUGQ Firmware for Samsung Galaxy S21 SM-G991U1. Then extract the firmware file you just downloaded on your PC. You should get 5 files.
AP (System &Recovery)
BL (Bootloader)
CP (Modem / Radio)
CSC_*** (Country / Region / Operator)
HOME_CSC_*** (Country / Region / Operator)
- Now add each file to its relevant field in Odin v3.14.4. If you want to do a clean flash then Use CSC_*** or if you want to keep your apps and data then add in HOME_CSC_***.
- Switch off the device and then reboot your phone in Download / Odin mode pressing the POWER + VOLUME DOWN + BIXBY
- If the above options did not work then try 5 more methods by pressing;
- VOLUME DOWN + VOLUME UP than USB cable
- POWER + VOLUME DOWN + VOLUME UP
- POWER + VOLUME DOWN + HOME BUTTON
- (Note9) USB cable + VOLUME DOWN + BIXBY
- (Note10) POWER + VOLUME UP
- Once you are in download mode then connect your phone to the PC, if possible use the original USB cable you got with your phone.
- A BLUE box will show up with the COM port number when the Odin gets detected in your device.
- Make sure you don’t tick any extra boxes. The only options to be ticked are F.Reset Time and Auto-Reboot only.
- After that click on the start button, wait for Odin to say ‘PASS‘in a GREEN box.
- Once the flash is completed then your phone will reboot and then disconnect your phone from the PC
- Now again go to ODIN in PC and there you get AP (System &Recovery) get Extract the firmware file you just downloaded. You should get 1 file MD5-file in AP-field in Odin and add that.
- Reboot your phone in Download mode by pressing the POWER + VOLUME DOWN + BIXBY
- Once you are in download mode then connect your phone to the PC, if possible use the original USB cable you got with your phone.
- A BLUE box will show up with the COM port number when the Odin gets detected in your device.
- Make sure you don’t tick any extra boxes. The only options to be ticked are F.Reset Time and Auto-Reboot only.
- After that click on the start button, wait for Odin to say ‘PASS‘in a GREEN box.
Voila! The Samsung Galaxy S21 SM-G991U1is updated with G991U1UEU4AUGQ Firmware for USA users.