Download Stock Rom / Firmware for Samsung Galaxy S21
|Model / Model||SM-G991B Binary 3 U3, S3, Bit 3|
|Region / Country / Country||Brazil / Brazil|
|Language / Language||Multi Language / Language|
|Android version||11 R|
|Operator / Operator / Carrier||Clean ZTO (no logo, carrier apps)|
|Security Patch Level / Security||2021-08-01 (August 1, 2021)|
|Size / Size||6.3 GB|
Attention to Binary of Rom
Common Binary or Binary errors when installing a rom or firmware on the S21 SM-G991B
SYSTEM REV. CHECK FAIL DEVICE 2 BINARY 1
SYSTEM REV. CHECK FAIL DEVICE 3 BINARY 2
SYSTEM REV. CHECK FAIL DEVICE 4 BINARY 3
SYSTEM REV. CHECK FAIL DEVICE 5 BINARY 4
SYSTEM REV. CHECK FAIL DEVICE 6 BINARY 5
SYSTEM REV. CHECK FAIL DEVICE 7 BINARY 6
SYSTEM REV. CHECK FAIL DEVICE 8 BINARY 7
DEVICE = Binary of the rom that is installed on your device
BINARY = Binary of the rom you are trying to install
If you get any error similar to the ones described above, it means that you are trying to install a firmware with binary lower than the firmware already installed on your device.
Look for a firmware with binary equal to or greater to proceed with the installation without errors.
Can’t find the rom with your specific binary?
Use the top menu, under the “Orders” tab, enter “Samsung” make your request,
don’t forget to put the desired model and binary.
Tutorial to install stock rom / firmware on galaxy S21 SM-G991B
Using Odin, follow these steps below.
Attention, there are 2 installation modes, with 4 and/or 5 files, or
installation with 1 file.
obs: for firmware with only 1 file, follow the same process, add only in AP/PDA
Installation for roms with 5 files via Odin
To Download current Odin or previous versions compatible with your device< Aqui >>
Extract the firmware you just downloaded. You should get 5 files:
1- AP (System & Recovery)
two- BL (Bootloader)
3- CP (Modem / Radio)
4- CSC _ *** (Country / Region / Operator)
5- HOME_CSC _ *** (Country / Region / Operator)
Add each file to its respective field in Odin vx.xx.x.
use CSC _ *** if you want to make a clean flash or
HOME_CSC _ *** if you want to keep your apps and data.
Restart your phone in Download / Odin mode with the following button combination:
POWER + VOLUME DOWN + BIXBY
Other options if the first option does not work or is not possible.
VOLUME DOWN + VOLUME UP, plug in USB cable
POWER + VOLUME DOWN + VOLUME UP
POWER + VOLUME DOWN + HOME BUTTON (this is the most common)
Once in download mode, connect your phone to the PC, preferably using the original USB cable.
Odin should detect your device and a BLUE box will appear with the COM port number.
(Make sure SAMSUNG DRIVERS are installed on your PC)
DO NOT check any extra boxes. The only options to be checked are F.Reset Time and Auto-Reboot.
Click the start button, wait for Odin to say ‘PASS’ in a GREEN box. When the flash is complete, the phone will reboot and you can disconnect the phone from the PC.
* The first boot (initialization) may take a few minutes, don’t do anything, just wait.
For a tutorial with images, go to < >>
The information described above was taken from the of the file,
we are not entirely sure if it is correct, feel free to send us
a correction through the comments, we appreciate your contribution.
We are not responsible
for any damage caused to the devices.
The responsibility is entirely with the user.