Xiaomi Redmi Note 4: How to roll back the MIUI update safely

Owners of the popular Xiaomi Redmi Note 4 smartphone often face a situation when the device starts to work unstable after an automatic system update, the battery runs out faster, interface lags appear or important functions disappear, at such moments, the only sensible solution is to return to the previous, more stable version of the operating system.

The rollback procedure, or downgrade, requires careful and rigorous follow-up. The wrong approach can lead to loss of personal data or, in the worst case, software locking of the device. However, with the latest information, you can restore the functionality of your gadget without going to the service center.

In this article, we will take a closer look at all the methods available to return old firmware to the Redmi Note 4, explain the differences between the global and Chinese versions, and pay special attention to preparing the device for critical changes in the software.

Preparation of the device and important nuances before rollback

Before you start any manipulation of system files, you need to make sure that the smartphone and computer are fully ready. The most important step is to create a full backup of all data, since the rollback process almost always involves completely clearing the internal memory of the device.

You'll need to download the exact firmware version you want to install. It's important to understand that rollbacks are only possible on a version with a lower build number than the current one. It's also critical to check the type of your current firmware: if you have Global, you need to roll back on Global, you can't mix versions (e.g., put China on Global) without completely reflashing it.

⚠️ Attention: Downgrade process MIUI 9 or 10 on earlier versions (e.g, MIUI 8) Redmi Note 4 is often blocked by anti-rollback protection. Attempting to install old firmware on a device with activated protection can lead to "brickle" of the smartphone.

Make sure that the battery charge is at least 60-70%. Interrupting the recording process due to battery discharge is one of the most common causes of failure. USB-cable and a good computer port for connection.

You may also need an unlocked bootloader to perform the operation.In some cases, standard methods of rollback through the recovery menu do not work without superuser rights or unlocking, especially if the Android security version has been upgraded.

Recovery method through the built-in Recovery menu

The easiest and safest way to return a previous version of the software is to use the Recovery menu, which does not require a connection to the computer and works directly on the device, but has a limitation: you can only roll back one version or the one that is already present in memory.

To start, download the desired firmware archive in.zip format from the official website or a trusted source. The file must be renamed to update.zip and placed in the root folder of the internal memory of the smartphone. Do not put the file in any subfolders, otherwise the system will not see it.

Then you go to recovery mode. To do this, turn off your smartphone and press the power and volume buttons at the same time. Hold them until the Mi logo appears, then release the power button, continuing to hold the volume button.

From the Recovery menu, select the language (usually English and Chinese) and then click on Wipe Data to clean up the data, then select Install update.zip or the same update file selection option. The system will check the integrity of the file and, if it is available, will start installing it.

Once the process is complete, the phone will suggest rebooting. The first run can take up to 10-15 minutes, as the system will reassemble the cache and adjust the settings. Don't panic if the screen is lit with the logo for a long time - this is normal behavior after a reset.

Use of Fastboot Mode and Mi Flash

If the standard Recovery method didn’t work or you want to “clean” install an older version, you’ll need Fastboot mode.This method is more powerful and allows you to ignore some version checks, but it requires a PC and installed ADB/Fastboot drivers.

Download and install the Mi Flash Tool on your computer, and you will need a firmware image in.tgz (not zip!) format, which you need to unpack into the root folder of the disk, preferably the path is short, for example, C:\mi_rom\.

Turn off your smartphone and press the power and volume buttons. When the image of a hare in a hat appears on the screen, connect the device to your computer. In Windows Device Manager, it should be defined as Android Bootloader Interface.

In Mi Flash, choose the path to unpacked firmware. In the lower right corner, be sure to select the clean all option to avoid file conflicts. Press Flash and wait for the process to end, which will take 200 to 500 seconds.

Unlocking the bootloader: when it is necessary

Many users wonder if Bootloader is needed to unlock a downgrade. In most cases, the Redmi Note 4 with global firmware is not required unless you are changing region (e.g., from China to Global).

You can check the status by logging into Fastboot mode. If it says Locked, the bootloader is closed. To unlock it, you will need to apply through the official Mi Unlock website, link your Mi Account in your phone settings and wait from 3 to 7 days (sometimes up to 30 days).

Unlocking allows customized recaps like TWRP to be installed, which give you more freedom to manage your system files, and TWRP can force you to install almost any version of the software bypassing standard signature checks.

However, it is worth remembering that unlocking the bootloader results in a complete reset of device data and can affect the operation of some banking applications or security features, such as Widevine L1, which will reduce the quality of video playback in streaming services.

Compatibility issues and anti-rollback protection

One of the main problems when trying to roll back the Xiaomi Redmi Note 4 is the anti-rollback protection mechanism. Starting with certain versions of MIUI, the company implemented a security index check. If you try to install a firmware with a lower index, the phone will simply refuse to boot or go into a perpetual reboot cycle.

You can find out the current Anti-rollback index through special applications or in Fastboot mode (vbmeta or similar). If the index is elevated, the official rollback path is closed. In such situations, only flashing to the same version or higher, or using service tools to reset the counter, which is a difficult procedure.

⚠️ Warning: Ignoring warnings about the Anti-rollback version can lead to irreversible consequences.Always check the build number and firmware release date before installing.

There are also differences between the processors. Redmi Note 4 was released in two main versions: on the Snapdragon 625 processor (global version, codename mido) and MediaTek Helio X20 (Chinese version, codename nikel).

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Use the Device Info HW app to pinpoint your CPU model and device code before downloading the firmware. An error in choosing a "mido" model over a "nikel" model is guaranteed to bring your phone down.

Frequent errors and ways to fix them

Users often experience common errors in downgrade, such as the "Can't verify update," which means that the firmware file is corrupted when downloaded or is not suitable for your current version. Solution: double-check the hash or download it again.

Another common problem is hanging on the Mi logo after installation. If the phone is hanging for more than 20 minutes, try a forced reboot (press the power button for 15-20 seconds). If that doesn't help, you'll have to use Recovery mode for a full reset (Wipe All Data).

Sometimes your computer stops seeing your phone in Fastboot mode. In this case, check Windows Device Manager. If there's a device with a yellow exclamation mark or "Unknown Device," you need to reinstall the Qualcomm HS-USB QDLoader or Android Bootloader drivers.

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The key to a successful rollback is the exact matching of the device model, firmware type (Global/China) and the absence of active anti-rollback locking for older versions.

FAQ: Frequently Asked Questions