Updating a smartphone operating system is always a lottery. Manufacturers, including Huawei, promise improved performance and new features, but in practice, users often encounter the opposite situation. The battery begins to discharge faster, the interface slows down, and familiar functions disappear or do not work correctly. This problem becomes especially acute after major updates, when the version of EMUI or HarmonyOS is changed.
There is a natural desire to return everything “as it was.” Firmware rollback - the procedure is technically complex and fraught with risks, but is quite doable if strict rules are followed. In this article, we will analyze legal methods of returning to a previous version of software, using the company’s official tools, and warn against actions that can turn your phone into a “brick.”
Before taking active steps, you need to understand the main thing: the procedure downgrade (downgrading the version) will inevitably lead to complete data loss. The system will not allow you to save photos, contacts and messages when downgrading to an older version for security and database compatibility reasons. Therefore, the first and most important step is to create a complete backup copy of everything valuable.
Why you may need to roll back an update
Users rarely decide to take such drastic measures without a good reason. Usually the impulse is a sharp change in the behavior of the device. After installing a new update package, your smartphone may begin to overheat even during simple tasks, such as browsing social media feeds or typing. This often indicates unoptimized code in a new build.
Another common problem is software conflicting with installed applications. Developers of popular apps do not always have time to adapt their products to the latest versions Android or shell EMUI. As a result, banking applications may stop launching, and instant messengers may crash in the background. In such situations, returning to a stable version becomes the only working solution.
⚠️ Attention: A rollback is only possible if the manufacturer provides archives of old firmware versions. For some new Huawei models with pre-installed HarmonyOS, returning to pure Android may be technically impossible or blocked at the bootloader level.
It is also worth mentioning problems with autonomy. The new version of the software may not work correctly with the power controller of a specific battery revision, which leads to jumps in the charge percentage or sudden shutdowns. If you notice that the phone lives significantly less than before the update, it makes sense to try returning the previous build.
Preparing a smartphone for the downgrade procedure
The success of the operation depends 90% on the quality of preparation. Chaotic actions without prior verification can lead to irreversible errors. The first step is to make sure that the battery charge level is at least 60%. The flashing process is energy-consuming, and a sudden power outage at the critical moment of writing system partitions is fatal for the device.
Next, you should free up space in the internal memory. For recovery tools to work correctly, free space is required, the amount of which often exceeds the size of the firmware file itself. It is recommended to delete unnecessary video files or temporarily transfer them to your computer or cloud storage.
Be sure to perform a full backup of your data. Use not only cloud services for this, but also local copying to your PC. Pay special attention to folders DCIM, Documents and messenger settings. After the rollback, the phone will be in a “out of the box” state, and it will be impossible to restore data without a preliminary copy.
☑️ Ready for rollback
It is also important to check the device model and the current build version. This information is in the menu Settings → About phone. Write down the build number (for example 12.0.0.123), since to rollback you will need to find a version with a lower number or a special version for downgrade.
Rollback method through the HiSuite application on PC
The most secure and The manufacturer's recommended method is to use a proprietary utility HiSuite for your computer. This app officially supports the function of restoring a previous version of the system, if it is available on the company's servers. Connect your smartphone to the computer with the original cable and launch the application.
In the main menu of the app, find the section System Restore (System Recovery). When you click this button, the utility will contact the server and check for software versions available for your device. If the server allows rollback, you will see a list of available builds. Select the one that preceded the current one and click the “Start recovery” button.
Path to the HiSuite menu: Home → System Restore → Select version → StartThe process will take from 10 to 30 minutes depending on the connection speed and data volume. During this time, the phone will reboot several times. Strictly prohibited unplug the cable or close the app until a success message appears. If the process is interrupted, the structure of the boot partitions may be damaged.
If HiSuite does not see the phone, try installing drivers manually through Windows Device Manager or use another USB port, preferably USB 2.0, as they are more stable for firmware.
⚠️ Please note: The HiSuite rollback feature is not available in all regions or models. In some cases, the recovery button may not be active if the server does not provide the old firmware for your CUST/Region combination.
Using eRecovery mode for local recovery
If you don't have a computer at hand or HiSuite does not work, you can use the built-in disaster recovery mode eRecovery. This method allows you to install the firmware directly from the memory card or internal storage if the update file has already been downloaded. First, you need to download the required firmware package (usually a file with the extension .zip or .app) from the official support portal.
Copy the downloaded file to the root directory of the memory card or to the internal memory folder dload (create it if it is missing). Then turn off your smartphone and hold down the key combination: Volume up + Volume down + Power button. Hold them until the Huawei logo appears, then release the power button, but continue to hold the volume buttons until you enter the eRecovery menu.
In the menu that appears, select item Download latest version and recovery (Download latest version and restore) or Local update (Local update), if the file is already on the phone. The system will check the integrity of the package and prompt you to begin installation. Confirm the action, and the process will proceed automatically.
| Parameter | HiSuite (PC) | eRecovery (Menu) | dLoad (Buttons) |
|---|---|---|---|
| Availability PC | Required | Not required | Not required |
| Difficulty | Low | Medium | High |
| Error risk | Minimum | Average | High |
| File requirements | Automatic download | Manual download | Strict folder structure |
eRecovery mode is the “last line” of protection. It works even if the system is damaged, but requires a working firmware file on the media.
Forced firmware method via the dLoad folder
This method is considered the most powerful tool in the arsenal of advanced users. It allows you to flash your phone even if the operating system does not load at all. The essence of the method is to manually place the firmware files in a special directory, which the bootloader checks when starting in a special mode.
You will need to download the full firmware package (Full OTA) corresponding to your model and region. The file must be unpacked in such a way that inside the folder dload there is a file UPDATE.APP. The structure on the memory card should look exactly like this: Memory card root → dload → UPDATE.APP. Any deviation in the name of the folder or file will cause the phone to simply ignore the command.
After preparing the media, turn off the device. Press three buttons at the same time: Volume up, Volume down and Power. Hold them until the Android logo appears on the screen and the installation process begins. The screen may display a progress bar in the form of a green robot or simply the percentage of completion.
⚠️ Attention: When using the dLoad method, the phone may ignore the version check. An attempt to install incompatible firmware (for example, from a different region or model) will most likely result in a cyclic reboot (bootloop).
If the process freezes at any point for more than 15 minutes, the firmware file may be damaged or not suitable for the device. In this case, you will have to remove the battery (if it is removable) or force a reboot of the phone by long pressing the power, and then try another firmware file.
What to do if the phone went into Bootloop?
If after a rollback the phone reboots endlessly, try entering eRecovery mode again and selecting “Wipe data/factory reset”. This will delete all data, but may resolve conflicting files between the old and new system. If this does not help, you will need to flash the firmware via the computer using the Huawei Multi-Tool app.
Possible risks and errors when rolling back the system
Even if you follow all the instructions, the process is not without risks. The most common mistake is inconsistency with the bootloader version. New updates often update the bootloader, which is backwards compatible. The old firmware may simply refuse to run on the new bootloader, considering it incompatible.
There is also a risk of losing security certificates. In some cases, after a downgrade, functions related to hardware identification, for example, fingerprint unlocking or Face ID, stop working. This is due to the fact that security drivers in the old firmware cannot interact correctly with the updated phone security module.
Another problem is the device region. The firmware is strictly locked to the region (CUST). An attempt to install European firmware on a Chinese phone or vice versa without first changing the region (which is now extremely difficult to do officially) will result in a signature verification error. The system will see the file, but refuse to install it.
- 📉 Loss of warranty: In some service centers, traces of manual intervention in the software can become a formal reason for refusal of warranty service, although rolling back to the official firmware itself is not rooting.
- 🔒 FRP lock: After resetting the data and rolling back the system may require confirmation of the Google account or Huawei ID that was synchronized earlier. Make sure you remember the password.
- 📡 IMEI problems: In rare cases, if there are errors in writing EFS partitions, the base station may disappear. The phone will see the SIM card, but will not connect to the network.
⚠️ Attention: Menu interfaces and item names may differ depending on the EMUI version. If you do not find the described item, check the official user manual for your specific model on the Huawei support site.
Frequently asked questions (FAQ)
Is it possible to roll back the update without losing data?
Unfortunately, no. The Android architecture and Huawei's security policy do not allow downgrading the system version while preserving user data. The application databases and system settings of the new version are incompatible with the old one. An attempt to bypass this limitation through third-party utilities will most likely lead to system failure.
Where can I find the old firmware version officially?
Huawei used to have an open portal for downloading firmware, but now it is closed to most users. You can officially get the file only through the HiSuite application (if the server allows it) or by contacting an authorized service center. Third-party resources (for example, profimeizu or androidhost) may offer files, but you use them at your own risk.
What is the CUST version and why is it important?
CUST (Customer) is a configuration file responsible for regional settings, language, pre-installed applications and communication frequencies. When rolling back, the CUST version must match or be older than the current one, but must correspond to the region where your phone was sold. Mixing CUSTs of different regions is a sure way to a broken phone.
The phone says “Update failed”, what should I do?
This error means that the system cannot verify the signature of the update file. The reasons may be different: the file was damaged during download, the version is too old for the current loader, or the folder structure is broken (for the dLoad method). Try downloading the file again, checking the checksum, or using another rollback method (for example, through HiSuite).
Is it safe to rollback from HarmonyOS to EMUI?
In most cases, such a rollback is impossible using legal methods. Switching to HarmonyOS often involves permanently updating memory partitions. Official tools usually do not offer an EMUI version after installing HarmonyOS. Attempts to do this using artisanal methods can lead to a complete loss of functionality of the smartphone.