[Samsung Galaxy A80 Guides, News, & Discussion] BK☑️:
WARNING: You can't downgrade anymore once you flashed U4/S4 March update !

https://samfrew.com/model/SM-A805F/

SM-A8050

SM-A805F

SM-A805N you can't unlock bootloader on this variant! (R1Q_KOR_SINGLE.pit)

You will need:

-Odin v3.14.1

https://dl2018.sammobile.com/Odin3-v3.14.1.zip

-Galaxy A80 Latest USB Driver

https://developer.samsung.com/galaxy/others/android-usb-driver-for-windows

You want to download latest firmware directly from server? (fast download)

Samfirm 0.4.1 or Frija 1.4.2

https://samfirmtool.com/samfirm-v0-4-1

https://github.com/wssyncmldm/frija/releases

Frija not working ? install both vcredist_x00 for your device !

(Check your windows settings to know which version to install).

(Microsoft Visual C++ 2010 Redistributable Package) and (Microsoft Visual C++ 2008 Redistributable Package)

-https://www.microsoft.com/en-US/download/details.aspx?id=29 (x86) 2008

-https://www.microsoft.com/en-US/download/details.aspx?id=5555 (x86) 2010

-https://www.microsoft.com/en-US/download/details.aspx?id=15336 (64bit) 2008

-https://www.microsoft.com/en-US/download/details.aspx?id=14632 (64bit) 2010

-Open Frija and type in your model (mine is SM-A805F) and your CSC : (mine is LUX).

(All CSC's and models on Samfrew: https://samfrew.com/model/SM-A805F/).

-Download and extract SM-A805XX_1_00000000000000_xxxxxxxxxx_fac.zip

On your device:

If you want to unlock bootloader:

-Go to Settings then to About phone and find your build number.

-Tap on your build number 6 times until you see “You’re now a developer”.

-Go in Developer options > enable OEM unlocking.

-Connect the device to your PC.

-Power off your device with POWER and volume DOWN and directly hold volume UP and DOWN together!

-Device will boot in DOWNLOAD MODE.

-Long press volume UP to unlock the bootloader. This will wipe your data and automatically reboot your device!

If you dont want to unlock bootloader:.

-Download and extract Odin and open it as administrator.

Still in DOWNLOAD MODE:

-Click on BL and select BL_A805FXXXU4AXXX_CL16843479_QB27603640_REV00_user_low_ship_MULTI_CERT.tar.md5

-Click on AP and select AP_A805FXXXU4AXXX_CL16843479_QB27603640_REV00_user_low_ship_MULTI_CERT_meta_OS9.tar.md5

-Click on CP and select CP_A805FXXXU4AXXX_CP14483800_CL16843479_QB27603640_REV00_user_low_ship_MULTI_CERT.tar.md5

(If you want to keep your data don't flash CSC).

-Click on CSC and select CSC_OMC_OXM_A805FXOXM1AXXX_CL16843479_QB27603640_REV00_user_low_ship_MULTI_CERT.tar.md5

-Click on USERDATA and select HOME_CSC_OMC_OXM_A805FXOXM1AXXX_CL16843479_QB27603640_REV00_user_low_ship_MULTI_CERT.tar.md5

-Click on START and wait for installation, when done you can unplug your device.

ROOT​

Your KNOX status will be tripped if you follow this tutorial...​

What's knox ? : https://www.google.com/search?q=samsung+knox+explained

-Download the latest stock firmware for your Samsung Galaxy A80 with Samfirm/Frija app (faster) or Samfrew/Sammobile website (way slower).

https://samfrew.com/model/SM-A805F/

-Extract the SM-A805XX_1_EXAMPLE_0000000000_fac.zip file with 7zip or any other unzipper.

-Copy the (AP_A805XXXXU1XXXX_CL00000000_QB00000000_REV00_user_low_ship_MULTI_CERT_meta_OS10.tar.md5) file and transfer it to your internal storage.

-Download and install Magisk Manager APK https://github.com/topjohnwu/Magisk/releases/download/manager-v7.5.1/MagiskManager-v7.5.1.apk

-Open Magisk Manager and go to Install > Install > Select and Patch a file.

-Navigate through the storage and select the extracted AP file.

The firmware will be patched and will be found in Internal Storage/Download/magisk_patched.tar

.

-Transfer the patched file to your PC.

-Turn OFF your device and boot into DOWNLOAD MODE.

-In Odin, click on AP and select the patched tar file, Uncheck “Auto Reboot” and click on Install.

The tool will flash Magisk V20 on your Samsung Galaxy A80.

To boot in recovery or boot the system with Magisk installed:

1. Powering up normally → System without Magisk

2. Power + Volume Up → Bootloader warning → Release all buttons → System with Magisk

3. Power + Volume Up → Bootloader warning → Keep holding volume up → Actual recovery