How to Fix Fastboot: Error: ANDROID_PRODUCT_OUT Not Set

The next step is to add the Android SDK Platform Tools to the environmental variables path. This is necessary so that your system can find the necessary files to complete the flashing process. Here's how to do it:

1. Press Windows key + Pause/Break to open the System Properties window.

2. Click on the Advanced System Settings link.

3. Click on the Environment Variables button.

4. Under System Variables, scroll down and find the Path variable.

5. Click on the Edit button.

6. Click on the New button and add the path to the extracted Android SDK Platform Tools folder.

7. Click OK to save the changes.

Now that you have the necessary tools and have added them to the environmental variables path, you need to transfer the file that you want to flash inside the platform-tools folder. Here's how to do it:

1. Connect your Android device to your computer via USB cable.

2. Enable USB debugging on your Android device by going to Settings > Developer options.

3. Copy the file that you want to flash to the platform-tools folder.

Flashing means installing a custom firmware, kernel, or recovery image on your Android device. The platform-tools folder is where you have extracted the Android SDK Platform Tools.

The next step is to launch Command Prompt with the platform-tools folder directory. This is important because you need to execute the flashing commands from within this folder. Here's how to do it:

1. Press Windows key + R to open the Run dialog box.

2. Type cmd and press Enter.

3. Navigate to the platform-tools folder directory by typing cd path/to/folder and pressing Enter.

To execute the flashing command, you need to boot your device to Fastboot Mode and connect it to your PC via a USB cable. Here's how to do it:

1. Turn off your Android device.

2. Press and hold the Power button and Volume Down button simultaneously until you see the Fastboot Mode screen.

3. Connect your Android device to your PC via USB cable.

Fastboot Mode is a special boot mode that allows you to send commands to your device's bootloader.

The final step is to execute the desired flashing command. This command will depend on what you want to flash on your Android device. Here's how to do it:

1. In Command Prompt, type the flashing command and press Enter.

2. Wait for the flashing process to complete.

3. Once the flashing process is complete, reboot your Android device.

The flashing command is a specific command that installs the custom firmware, kernel, or recovery image on your Android device.

In conclusion, if you encounter the Fastboot Error: ANDROID_PRODUCT_OUT Not Set, don't worry. By following the steps outlined in this guide, you can fix the error and get back to customizing your Android device. Remember to download and extract the Android SDK Platform Tools, add them to the environmental variables path, transfer the file to the platform-tools folder, launch Command Prompt with the folder directory, boot your device to Fastboot Mode, and execute the desired flashing command. Happy customizing!