Downgrade Xiaomi Mi A2 Lite: Returning Android 9 Pie

Many owners of Xiaomi Mi A2 Lite have faced the fact that the upgrade to Android 10 brought more problems than improvements. The device, originally released as part of the Android One program, received the final major version of the OS, but its optimization left much to be desired. Users often complain about the fast battery discharge, lag in the interface and unstable camera performance after the transition to the “ten”.

Returning to Android 9 Pie is the only effective way to reanimate a smartphone if the software methods of cleaning the cache do not help. However, the process of downgrade (rollback) is significantly more complicated than a conventional update and requires strict adherence to the sequence of actions. Any deviation from the instructions can lead to software errors or even data loss.

In this guide, we will discuss all the steps of the procedure, the necessary tools and the possible risks. Attention: this operation involves the complete removal of all data from the device, so pre-backup is a must-do step, without which you should not even start.

Why you should go back to Android 9 Pie

The main reason why enthusiasts are eager to roll back the Xiaomi Mi A2 Lite is because of the hardware limitations of the Snapdragon 625 processor. While it has proven itself to be reliable, it struggles to cope with the increased demands of modern versions of the operating system. On Android 10, background processes consume more resources, which directly affects autonomy.

In addition, many users note problems with the Wi-Fi and Bluetooth module after the upgrade, the signal becomes less stable, and the connection speed drops, and returning to the previous version of the software often eliminates these hardware and software conflicts, returning the device to its former responsiveness.

• 🚀 Performance: Interface runs smoother, micro-freeze disappears when switching between applications.
• 🔋 Autonomy: The operating time from one charge increases by 15-20% Better energy management.
• 📷 Camera: Photo processing algorithms on Android 9 often give more natural colors and focus faster.

And there's application compatibility, too. Some old but useful tools may not work well on newer APIs, and system stability is the main trump card of the previous OS for this model.

Preparation of device and computer

Before you start any manipulation of the system partition, you need to make sure that the workplace is fully ready. USB-cable and stable internet connection. USB-Hubs or extension cords – connect your smartphone directly to the motherboard port.

The critical step is to unlock Bootloader. Without this step, installing an older firmware version is impossible, as the security system will block the downgrade. Make sure that the Mi Account is tied to the device at least 7 days (168 hours) ago, otherwise the server will not issue permission.

It is also necessary to download the official Fastboot firmware for Android 9. It is important not to confuse the global version (Global) with the European (EEA) or Indian, since firmware of a regionally incompatible version can turn a smartphone into a “brick”.

Required tools and drivers

To do this, you'll need specialized software. Windows standard tools won't be enough to interact with the bootloader at a low level. The main tool will be the Mi Flash Tool, which allows you to force the system to record images.

Pay special attention to drivers. The computer must correctly identify the device in the modes ADB and Fastboot. If the Manager of devices appear unknown devices with yellow exclamation points, the procedure can not continue.

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Use the original. USB-Cheap analogues often can't withstand long-term transmission of large amounts of data and can interrupt the firmware process.

After installing all the components, it is recommended to restart the computer, which ensures that all system services and drivers are properly initialized before starting work.

Firmware search and preparation

The most important thing is to find the right firmware file. You need a version in the format of Fastboot (usually the archive has the extension.tgz), not Recovery (.zip). For the Redmi 6 Pro / Mi A2 Lite (codename daisy), it is important to find the global version of Android 9 if you are using a global smartphone.

The firmware archive must be unpacked to the root of the C: disk. The path to the folder must not contain Cyrillic characters or spaces, otherwise the Mi Flash Tool may not see the files or give an error when writing. C:\daisy_global_images_V10.0.1.0.PDQMIXM_20181214.0000.00_9.0_global.

Check the checksum of the downloaded file if the source provides it. A damaged archive can cause the phone to stop loading even in the recovery menu.

Instructions for rollback via Fastboot

Now, we're going to go through the direct flashing process, and you're going to put your smartphone in Fastboot mode, and you're going to turn the device off, and then you're going to press the power and volume buttons at the same time, and you're going to have a hare in a hat that's been repairing an android, or you're going to have a Fastboot on the screen.

Connect your phone to your computer. Run the Mi Flash Tool on behalf of the administrator. Press the Refresh button, your serial number device should appear on the list. If it's empty or an error instead of the number, check the drivers.

In the program interface, select the path to the unpacked firmware folder. In the lower right corner, be sure to select Clean all mode. This mode completely erases all memory partitions, which is necessary in downgrades to avoid file system conflicts.

⚠️ Warning: Never choose the "Clean all and lock" option when rolling back to an older version of Android! This will block the bootloader with an incompatible version of the software, and unlocking it back will be extremely difficult or impossible without service hardware.

Press Flash and wait until the process is complete. The progress bar will fill up and status will change to success. The phone will automatically reboot. The first download can take up to 10-15 minutes.

Possible errors and their solution

Downgrades can be technically challenging, and one of the most common errors is error: Not enough space, which occurs when you try to flash a version that is larger than the size of the partition, or if you choose the wrong firmware mode.

Another common problem is hanging on the Mi or Android logo, which may mean that the userdata partition has not been properly cleaned or the bootloader version does not match the system version, in which case a repeat of the procedure is required with a mandatory choice of full cleanup mode.

• 🔌 Connection problem: Try another one USB-Port or cable. Sometimes it helps to reinstall the drivers. ADB.
• 🚫 Anti-rollback error: If the firmware version has a higher rollback protection index than the current one, the process will be locked hardwarely.
• 💾 Lack of PC memory: Make sure there is enough space on the system drive for temporary operation files.

If the phone went to Hard Brick (does not respond to buttons, the screen is black), you will need to disassemble the device and close the test points to enter EDL mode, which is better to trust the specialists.

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The main rule of downgrade is to always use Clean All mode and never block the bootloader when installing an old version of the software.

Set up the system after rollback

After a successful boot, you'll see a welcome screen, like when you first turn on a new phone. The system will be clean, without your old data. Now you need to reconfigure the Xiaomi Mi A2 Lite and restore the data from the backup.

It is recommended to immediately disable automatic system updates so that the phone does not try to boot Android 10 again. To do this, go to Settings → About Phone → MIUI version, click on the tri-point in the corner and select Update Settings where you want to turn off autoboot.

Check the basic functions: calls, the Internet, GPS and sensors. Stable work on Android 9 should be noticeable immediately. The device will work faster and the interface will become more responsive.