How to roll back an Android update: safe ways to return the old firmware version

Android updates often bring new features, security fixes and optimizations, but sometimes they become a source of problems. Users encounter slowdown, interface bugs, battery drain or incompatibility with applications after an upgrade. In such cases, the logical solution is to roll back to the previous firmware version. However, this process requires caution: incorrect actions can lead to "briku" (complete inoperability) of the device or loss of data.

In this article we will look 5 proven ways to roll back updates from simple (through phone settings) to advanced (using ADB and custom recovery). You will learn how to prepare the device, what tools are needed for different brands (Samsung, Xiaomi, Google Pixel etc.), and how to avoid common mistakes. Important: not all methods are universal - the choice depends on the smartphone model, Android version and status unlock the bootloader.

Before you start, check:

• 🔋 Battery charge —at least 70%. Interrupting the process due to discharge can make the phone inoperable.
• 📱 Device model and the current version of Android (found in Settings → About phone).
• 💾 Backup important data (photos, contacts, messages). Rollback often requires a reset to factory settings.

1. Rollback via factory reset (the easiest method)

If the update was installed recently (usually within 10–30 days), some manufacturers allow you to return the previous version of Android through a standard reset. This method works. on devices Google Pixel, Samsung (series Galaxy S/A after 2020) and some models OnePlus. The main advantage is that it does not require unlocking the bootloader or PC.

How does it work? When resetting, the system checks for the presence of a backup copies of the previous firmware in the hidden section /data/ota_package. If it is there, the phone will offer to roll back. Important: this method it is not guaranteed to work on all devices.depends on the manufacturer's policy and the Android version.

Instructions:

1. Open Settings → System → Reset settings.
2. Select Delete all data (factory reset).
3. If appears option Roll back update or Restore previous version —confirm the action.
4. Wait for completion (takes 10–20 minutes). The phone will reboot with the old firmware.

⚠️ Attention: On devices Xiaomi, Realme i Oppo this method usually does not work. Manufacturers block rollback via reset to prevent users from reverting to outdated (and potentially vulnerable) versions of MIUI/ColorOS.

Brand	Supports rollback via reset?	Notes
Google Pixel	Yes (up to 30 days)	Works on Android 12+
Samsung Galaxy	Yes (on some models)	Requires supported firmware Rollback Protection
Xiaomi/Redmi	No	Requires unlocking bootloader
OnePlus	Yes (on OxygenOS 11+)	The option appears only when resetting through Fastboot

2. Rollback via Recovery Mode (for firmware with A/B partitions)

Modern Android devices (starting from Android 8.0 Oreo) use A/B-partitions for updates. This means that the system is installed on an inactive partition, and the previous version remains untouched until a successful upgrade. If the update was completed with errors, you can manually select to boot from the old partition.

Advantages of the method:

• 🔄 Does not require connection to a PC.
• 📱 Saves user data (if not reset).
• ⚡ Faster than flashing via ADB or Fastboot.

Step-by-step guide:

After rebooting, the phone will start with the previous version of Android. To fix the result, perform a factory reset (otherwise the system may update again the next time you connect to Wi-Fi).

⚠️ Attention: On devices with a locked bootloader (for example, Samsung or Huawei) this method may not work. It is also not suitable for phones where the update was installed more than a month ago - the old partition could have been overwritten.

What are A/B partitions?

A/B partitions are a technology for "seamless" updates, in which the system is installed on an inactive partition (for example, slot_b) while you are using the current version (slot_a). After successful installation, the phone reboots to the new partition, and the old one remains as a backup. This allows you to roll back if the update turns out to be problematic.

3. Rollback via ADB Sideload (for experienced users)

If the previous methods did not work, you can manually download the old firmware via ADB Sideload. This method is suitable for most devices, but requires an unlocked bootloader and basic command line knowledge. The advantage is that you control the firmware version and can choose any available build.

What you will need:

• 🖥️ A computer with ADB and Fastboot installed.
• 📱 USB cable (preferably original).
• 🔗 Firmware file in format .zip for your model (download only from official sources: Xiaomi — [miui.com](https://miui.com), Samsung — [sammobile.com](https://sammobile.com)).

Instructions:

1. Download the firmware and place it in the folder with adb.exe (for example, C:\platform-tools).
2. Enable USB debugging in the developer settings (Settings → About the phone → Build number (press 7 times) → For developers → USB debugging).
3. Connect the phone to the PC and open the command line in the folder with ADB.
4. Enter the commands:

   adb reboot recovery
       

   The phone will reboot into Recovery Mode.

5. In the menu select recovery Apply update from ADB.
6. On the command line, run:

   adb sideload filename.zip
       

   Wait for completion (may take 5-15 minutes).

7. After installation, select Reboot system now.

⚠️ Attention: Installing firmware via ADB Sideload can reset settings DRM keys (for example, for Widevine L1), which will lead to loss of support Full HD in streaming services (Netflix, Disney+). On some devices (for example, Sony Xperia) this can only be fixed by flashing it at a service center.

4. Rollback via Fastboot (for devices with an unlocked bootloader)

Method Fastboot is the most reliable rollback method, but also the most risky. It is suitable for devices with an unlocked bootloader (bootloader) and requires official firmware in the format .img or .tgz. Most often used for phones Google Pixel, OnePlus, Xiaomi i ASUS.

Preparation:

• 🔓 Unlock the bootloader (instructions for Xiaomi: [en.miui.com/unlock](https://en.miui.com/unlock), for Pixel: [developers.google.com/android/images](https://developers.google.com/android/images)).
• 📥 Download the full firmware package for your model (for example, for Pixel 6 this will be the file raven-factory-image-...).
• 🛠️ Unzip the archive and place the files in the folder with fastboot.exe.

Firmware process:

1. Switch the phone to mode Fastboot:

   adb reboot bootloader

   Or turn off the device and hold down Power + Volume Down.

2. On the command line, run (for Google Pixel):

   fastboot flash bootloader file_name.img
   fastboot reboot-bootloader
   fastboot flash radio file_name.img
   fastboot reboot-bootloader
   fastboot -w update file_name.zip

   For Xiaomi use:

   fastboot flash all filename.tgz

3. Wait for completion (may take up to 30 minutes). The phone will reboot automatically.

Brand	Command for firmware	Notes
Google Pixel	fastboot -w update file.zip	Use official images from the Google website
Xiaomi	fastboot flash all file.tgz	Requires Mi account and unlock permission
OnePlus	fastboot flash all --slot=all file.zip	Supports A/B partitions

5. Rollback through custom recovery (TWRP)

If you have custom recovery installed on your device TWRP, rolling back the update becomes easier. This method allows you to install any firmware (including modified ones). backups and restore the system from a backup. However, it requires unlocked bootloader pre-installation TWRP.

Advantages of TWRP:

• 🔄 Ability to create a full backup of the current system before rolling back.
• 📦 Support for installing firmware from the community (for example, .zip-firmware from the community (for example, LineageOS).
• 🛠️ Restoring individual partitions (for example, only system or boot).

Instructions:

1. Download the firmware in format .zip (for example, from [forum.xda-developers.com](https://forum.xda-developers.com)).
2. Move the file to the SD card or internal memory of the phone.
3. Boot into TWRP (press Power + Volume up when turning on).
4. Make a backup of the current system: select Backup → mark the partitions System, Boot, Data → swipe to confirm.
5. To rollback select Install → indicate the downloaded .zip-file → swipe to install.
6. After completion, click Reboot System.

⚠️ Attention: Installing unofficial firmware via TWRP may lead to loss of warranty and problems with SafetyNet (bank ones will not work applications Google Pay etc.). Before installation, check the compatibility of the firmware with your model on the forum XDA Developers.

6. Rollback to Samsung: Odin features and tools

Devices Samsung use their own update system and require special software - Odin. Rolling back to them is complicated due to technology Rollback Protectionthat blocks the installation of outdated firmware. However, you can bypass this limitation using combined files (Combined ROM) or patches.

What you will need:

• 🖥️ app Odin (version 3.14+).
• 📱 Firmware in format .tar.md5 (download from [sammobile.com](https://sammobile.com) or [samfw.com](https://samfw.com)).
• 🔌 Original USB cable (preferably from kit).
• 🔧 Drivers Samsung USB Drivers (install from [developer.samsung.com](https://developer.samsung.com)).

Step-by-step guide:

1. Unpack the firmware (for example AP_, BL_, CP_, CSC_ files).
2. Open Odin and connect the phone in mode Download Mode (press Power + Volume down + Bixby).
3. B Odin upload files to the appropriate fields:
   • BL → BL_...
   • AP → AP_...
   • CP → CP_...
   • CSC → CSC_... (select HOME_CSCif you do not want to reset the data).

Click Start and wait for it to finish (do not unplug the cable!).

After rebooting, reset via Recovery (Wipe data/factory reset).

How to bypass Rollback Protection on Samsung?

To rollback to firmware older than 2-3 months, you will need a patch Downgrade Patch or combined firmware (Combined ROM). These files remove restrictions RMM/KG State and allow you to install any version. Look for them on. thematic forums (for example, XDA or 4PDA).

Common errors and how to avoid them

Rolling back an update is a risky process, and even experienced users encounter problems. Here are the most common errors and ways to solve them:

1. "Cannot load Android system" error or bootloop

• 🔹 Cause: Incompatible firmware or interrupted installation.
• 🔧 Solution: Repeat the firmware via Fastboot or Odin, making sure that the file is suitable for your model. If the phone is not. is loading, try erasing the cache (Wipe Cache Partition in Recovery).

2. Loss of IMEI or network after rollback

• 🔹 Reason: Partition damage modem or EFS (especially on Samsung i MediaTek).
• 🔧 Solution: Restore the backup copy EFS (if you made a backup) or flash a separate file CP (modem) via Odin/Fastboot.

3. Error "DM-Verity corruption" or "Your device is corrupt"

• 🔹 Reason: The integrity of the system is compromised due to modifications (for example, after root access).
• 🔧 Solution: Disable dm-verity via Magisk or flash the stock one boot.img.

4. The phone does not turn on after a rollback (brick)

• 🔹 Reason: Incorrect firmware, interrupted process or hardware incompatibility.
• 🔧 Solution: Try flashing via EDL Mode (for Qualcomm) or contact the service center. On some devices (for example, Xiaomi), a tool will help Mi Flash Tool with the option clean all.

FAQ: Answers to frequently asked questions

Is it possible to roll back an Android update without losing data?

In most cases, no. Rolling back requires overwriting the system partition, which results in a factory reset. The exception is the c A/B partitions method (section 2), but it does not work on all devices. Always make a backup via TWRP or ADB Backup before a rollback.

Why don't banking applications work after a rollback?

This is due to the trigger SafetyNet — Android integrity verification systems. After a manual rollback or installation of custom firmware ctsProfile may show false. Solutions:

• Install Magisk and activate the module Universal SafetyNet Fix.
• Flash the stock one boot.img without modifications.
• Use alternative authentication methods (SMS, push notifications).

How do I know if I can roll back the update on my phone?

Check:

• 📱 Model devices and the current Android version in Settings → About phone.
• 🔗 Policies manufacturer: Google and OnePlus often allow rollback, and Xiaomi and Huawei - block.
• 🛠️ Bootloader status: if it is blocked, rollback is possible only through official methods (section 1 or 2).

For an accurate answer, find the topic of your model on the forum XDA Developers or 4PDA.

What what to do if after a rollback the phone constantly prompts you to update?

The system can automatically check for updates. To stop this:

• Disable automatic checking in Settings → System → Software update → Settings (⚙️) → Auto update.
• Delete the update file manually via File Manager (path: /data/ota_package or /cache).
• For Samsung use the command in ADB:

  adb shell pm uninstall -k --user 0 com.wssyncmldm

  (removes the update service, but may break some functions).

Is it possible to roll back an update on a phone with a MediaTek processor?

Yes, but the process is more complicated than on Qualcomm. For MediaTek you will need:

• 🖥️ Tool SP Flash Tool instead Fastboot.
• 📥 Firmware in format scatter-file (download from official sources or trusted forums).
• 🔧 Unlocked bootloader (on some models requires authorization via MTK Auth Bypass).

Attention: Firmware via SP Flash Tool erases IMEI and NV-data. Always make a backup via MTK Droid Tools before starting!