Downgrade Galaxy M21s Android 12_to_11
How to Downgrade Galaxy M21s from Android 12_to_11 Downgrading your Galaxy M21s from Android 12_to_11 to an earlier version can help you regain stability, improve battery life, or restore compatibility with older apps. Whether you’re dealing with bugs in a new update or simply prefer the previous Android experience, this guide walks you through every…
How to Downgrade Galaxy M21s from Android 12_to_11
Downgrading your Galaxy M21s from Android 12_to_11 to an earlier version can help you regain stability, improve battery life, or restore compatibility with older apps. Whether you’re dealing with bugs in a new update or simply prefer the previous Android experience, this guide walks you through every essential step.
Please note that downgrading your device is an advanced process and will wipe all your data. Be sure to back up everything before continuing. If you’re not comfortable with the steps, visit our Android Downgrade Tool page for an easier solution.
Before You Start
- Ensure your bootloader is unlocked. Most downgrade processes require an unlocked bootloader.
- Download the exact factory image for the Android version you want to downgrade to. You can explore versions on our Android Version Downloads page.
- Install ADB and Fastboot on your PC or Mac. These tools are essential for flashing system images.
Step-by-Step Downgrade Instructions for Galaxy M21s
- Power off your Galaxy M21s and boot it into Fastboot mode. Usually, this is done by holding Volume Down + Power buttons together.
- Connect your device to your computer using a USB cable.
- Open a command terminal and navigate to the folder where the factory image is extracted.
- Run the following Fastboot commands in order:
fastboot flash bootloader bootloader.img fastboot reboot-bootloader fastboot flash radio radio.img fastboot reboot-bootloader fastboot -w update image.zip - Wait for the flashing process to complete. Your device will reboot automatically.
- Follow the on-screen setup process as if it were a brand new phone.
If you encounter issues during installation, check out our ADB & Fastboot Error Fixes article for troubleshooting tips.
Warning: Downgrading firmware may void your warranty and can potentially brick your device if done incorrectly. Always proceed with caution and ensure you’re using the correct files for your device model.
Once you’ve downgraded successfully, you can enhance your setup by installing a custom ROM for optimized performance and battery life. Learn more on our Custom ROMs for Android guide.
