PREREQUISITES:

Backup your data: The flashing of the firmware should be started only after ensuring that you have backed up the data. Otherwise, you can lose the data which might be important.

Charged your device: First of all, assure that your Samsung Galaxy S8 is fully charged to avoid any sort of interruptions during the flashing process.

Download the required files:

Install the Samsung USB drivers required for the process on your machine.

Get the Odin file which is a flashing tool.

Finally, Find the correct firmware file for your Samsung Galaxy S8 model. After that follow the next steps.

STEPS:

Enable USB Debugging:

For example on your Galaxy S8, I assume from Settings > About phone.

Click on “Build number” seven times, and you will have Dev options on.

Go back to the normal settings page, type on “Developer options” and then enable USB Debugging.

Download and Install Odin:

You will create a folder and extract the Odin zip file folders in your computer.

After that, run Odin as an Administrator.

Initialize Download mode on your device:

To start turn off your Galaxy S8. Then press and Click volume down keys, Bixby button, and Power button at the same time. When a warning pop-up appears press the volume up key to start the downloading mode.

Prepare the device for flashing:

Get your Galaxy S8 and a USB wire, connect it to a computer. Odin should also detect your computer, on Odin there is a blue symbol in the ID: COM slot.

Flash the firmware onto Odin:

Using a USB wire, download the tar or the tar file and click the AP button in Odin. Be sure for all of the options chosen in Odin are “Auto Reboot” and “F.Reset Time”.

Lastly, press on the Start button that appears on Odin. This is when the push begins. This step is going to consume a whole lot of time. Be aware of this in your head. Don’t disconnect the device otherwise.

Hold on until the process is done:

After the flashing process on Odin is complete, your Galaxy S8 is likely to be rebooted.orghold the power button for some time, and allow the galaxy S8 to restart only once. Then, hit the power button.

Configure your device:

Follow the on-screen instructions when setting up your device. For instance, you may need your personal information restored and the details of your Google account input.

Remember, these are standard instructions for flashing Samsung devices. Depending on the firmware you are running, the actual steps may vary significantly. Therefore, these instructions cannot be taken responsibility for. Consult the official sources for your device and tools.