This is the official Android 13, 12, and 11 stock firmware/ROM(Flash file) for the Samsung Galaxy S21 5G SM-G991U1.
The flash file for the Samsung Galaxy S21 5G SM-G991U1 is necessary when you want to perform any of the following software-related tasks:
- Upgrade/Update your Samsung Galaxy phone’s firmware.
- Reinstall the stock ROM that was officially installed.
- Unroot your Samsung Android device.
- Fix software issues that cause your device OS(Operating System) and apps to hang or misbehave.
- Fix unknown baseband error.
- Fix Samsung devices that are in a boot loop like hanging on the Samsung logo or rebooting continually.
- Use the firmware for Android development purposes.
- Remove malware, virus, and spyware from your Samsung device and more.
To flash the firmware to your Samsung device, we made a comprehensive Samsung Android firmware flashing tutorial using Odin. You will need to read that post to be able to flash a firmware successfully to any Samsung Android device.
Samsung Galaxy S21 5G SM-G991U1 Stock ROM Firmware(Flash File)
Here are the links to the stock firmware/flash file for the Samsung Galaxy S21 5G SM-G991U1 with the latest Android version available.
| Brand | Samsung |
| Name | Galaxy S21 5G |
| Model | SM-G991U1 |
| Android Version | 13 |
| Baseband | XAR G991U1UEU5DVL1 |
| Brand | Samsung |
| Name | Galaxy S21 5G |
| Model | SM-G991U1 |
| Android Version | 12 |
| Baseband | XAR G991U1UEU5BULH |
| Brand | Samsung |
| Name | Galaxy S21 5G |
| Model | SM-G991U1 |
| Android Version | 11.0 |
| Baseband | G991U1UEU1ATLI_G991U1OYM1ATLI_ACG |
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