[Galaxy A3, A5, A7, A8, A9 General] Galaxy S7 Nutzer:
I don't have much experience in flashing phones, but i know how to. I show you how to just beacause i had to spend HOURS on getting errors cuz something was wrong.

I have everything used here: https://gofile.io/d/e7FuMv

DISCLAIMER: This OS is NOT made by me! More infos here: https://xdaforums.com/t/rom-7-0-a3-2016-xperience-os-v2-5-updated-23-11-2017.3693161/#post-74261350

Please note that in this process you risk damaging your device.

Step 1: Enable OEM Unlock and USB Debugging Before you start, you need to enable OEM Unlock and USB Debugging on your device. Here’s how:

Go to your device Settings.

Select “About phone” » tap seven times on “Build number”. This will enable Developer options under Settings.

Go back to Settings » scroll down to the bottom and you’ll see Developer options menu.

Open “Developer options” menu » find OEM Unlock toggle and enable it.

Scroll down a bit and you’ll see Debugging menu, enable “USB Debugging” option from there.

Step 2: Extract the necessary files First, you need to extract the files i’ve prepared. You can do this using 7zip. Here’s how:

Right-click on the compressed file.

Hover over the “7-Zip” option in the context menu.

Click on “Extract Here” or “Extract files” if you want to choose the destination directory.

Step 3: Install TWRP using Odin Now that you have the necessary files, you can proceed to install TWRP on your device. Here’s how:

Launch Odin on your PC.

Boot your device into Download mode:

Switch off your device.

Press and hold “Home + Power + Volume down” buttons for a few seconds until you see a warning screen.

Press Volume Up on the warning screen to accept it and boot into Download mode.

Connect your device to the PC with a USB cable. The Odin window on PC should detect the device and show an “Added!!” message.

Click on the AP tab on Odin window and select the TWRP recovery .tar file that you downloaded for your device.

Click the Start button on Odin and wait for it to finish the process. Once it has finished successfully, you’ll see a pass message on the Odin screen. Your device will automatically reboot when Odin is done flashing.

Step 4: Move the custom OS to an SD card Before you install the custom OS, you need to move it to an SD card. Here’s how:

Connect the SD card to your PC using a card reader.

Copy the Xperience OS file to the SD card.

Safely eject the SD card from your PC.

Step 5: Install the custom OS (Xperience OS) After installing TWRP and moving the custom OS to an SD card, you can now install the custom OS. Here’s how:

Insert the SD card into your device.

Reboot your device into recovery mode.

In TWRP, click on “Wipe” and perform a factory reset.

Go back to the TWRP main menu and click on “Install”.

Navigate to the location where you saved the Experience OS file on the SD card and select it.

Swipe to confirm the flash. This will start the installation process.a

Once the installation is complete, reboot your device.

Be sure to follow all steps carefully and at your own risk. If you’re not sure about any step, it’s better to ask for help from someone who has more experience with this process. Good luck!