Odin is one of the popular and official tools to flash firmware/stock ROMs to Samsung Galaxy devices. This page contains a step by step guide on how to install or flash stock or custom firmware to your Samsung Galaxy device.

If you would like to know how to flash or install Samsung stock firmware on a compatible phone using Odin tool, kindly read on.

How to Flash Samsung Firmware/Stock ROM via Odin Flash Tool
Odin Flashtool is a lightweight software/utility developed by Samsung for servicing or flashing stock firmware/ROMs or custom flash files like TWRP recovery to Samsung devices.

Moreover, Odin is very easy to use and less complicated.

Firstly, extract the firmware/stock ROM for your Samsung device and place it on your computer before proceeding.
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Here’s a step by step guide on how to use Odin Flash tool to flash firmware/flash files to a Samsung Galaxy device.

Install Samsung USB Drivers on your Windows computer
https://samsungfirmware.net/category/samsung-drivers/

To install the latest official Samsung USB drivers for Windows, visit the official page to download the Android USB drivers for your Samsung.

Once the Samsung Android USB driver for Windows installation is complete, move to the next step. Installing latest samsung usb drivers on Windows computer.
Download Odin Flash Tool
https://samsungodin.com/
Odin is the official software/tool for flashing firmware to Samsung Galaxy phones. Download the latest version of Odin and extract the file to your PC.

After extracting, you should have a folder that looks like this. How to flash Samsung stock ROM firmware flash file via Odin flashtool, Odin folder
Launch/open Odin3 as an administrator on your Windows PC
To open Odin as an admin, right click on it and select Run as an Administrator. Once it’s open, you should see an image like this.
This-is-the-Odin-flashtool-interface-for-flashing-Samsung-Firmware
Put your Samsung phone in Download/Odin mode and connect it to the computer.
You need to put your Samsung device in Download/Odin mode for Odin to detect it.

To put or boot your Samsung device in Download/Odin mode, turn off your phone completely, press an hold the Power, Home, and Volume down buttons ( newer devices, press the Volume Down + Bixby + Power) button together until you see the warning notification on your screen.

Secondly, press the Volume up button to fully enter into Download/Odin mode. You can now connect your device to the PC.

Once you connect your phone, you will see a green COM port under ID:COM on the Odin flashtool screen. The COM port under ID:COM shows your Samsung device has been successfully connected/detected by Odin.

Odin will also show Added in the logs screen.

Select the stock firmware to be flashed.
It’s time to flash the firmware. Most Samsung stock ROMs are bundled in a single file while others (4 files/repair firmware) are packed separately as 4 files.

Therefore, you should know your firmware type after extracting the archived firmware file.

For single stock ROMs:
Click on the AP option and locate the .tar.md5 or the compatible flash file.

For 4 files/repair firmware:
After extracting the firmware, you will need to select the flash files one after the other into the BL, AP, CP, and Home_CSC box.

This is how to select a 4 file/repair firmware for Samsung in Odin.

Firstly, click on the ‘BL‘ button, then choose the file that starts with “BL” inside your extracted firmware folder.

Secondly, click on the ‘AP‘ button in Odin and choose the AP file inside your extracted firmware folder.

Next, click on the ‘CP‘ button, choose the CP file inside your extracted firmware folder.

Finally, click on the ‘CSC‘ button, choose the HOME_CSC file inside your extracted firmware folder.

Furthermore, this is how to understand those files and their functions.
BL(Bootloader)
AP/PDA-Application Processor (Can accept files single files like System, Boot, and recovery )
CP(Core Processor) or Modem file
Home_CSC(Consumer Software Customization

Note, when loading an AP file in Odin, it’s normal for Odin to freeze or take time to load large AP files. Don’t try to close it in this loading stage.

Also note: The pit file tab is for engineers only. Use with caution!

If you load every file, it should look like this. Odin-screen-showing-4-files-repair-firmware-including-BL-AP-CP-HOME_CSC-loaded-for-flashing
Click on Start to begin flashing the firmware
Once all the files are loaded correctly and your device is still detected by Odin, click on the Start button.

Flashing will take about 5-10 minutes depending on the size of the flash files. Once it’s successfully completed, you will see a green ”Pass” at the top of Odin.

Your Samsung device will reboot into the normal mode and then boot into the system after a while.

Please, make sure your device is charged more than 30%. Therefore, there would be no errors or breaks during flashing due to a low battery.

Source: https://samsungfirmware.net/how-to-flash-samsung-firmware-using-odin/

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