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Downgrade Nokia 6.2 from Android 11 to 10 via Fastboot Commands

In this guide, we will show you the steps to downgrade Nokia 6.2 from Android 11 to Android 10 via Fastboot Commands. The device from this OEM beholds the clean stock OS, all thanks to its underlying OS skin aka Android One. That also translates to the fact that your device should be the first in line to get blessed with the latest OS upgrades. Unfortunately, for Nokia that only sticks on paper because in reality that is far from the case. Anyways, at the time of writing, the devices have welcomed the eleventh iteration of the OS build.

However, a few bugs and issues have also seemed to have crept in along the way. Not to mention the fact that a few apps are facing compatibility issues as well. If you are also facing these problems and wish to escape this buggy user experience, then you could perform a rollback to the earlier OS build. And in this guide, we will show you how to do just that. Given here are the detailed instruction steps to downgrade Nokia 6.2 from Android 11 to Android 10 via Fastboot Commands. Follow along.

Downgrade Nokia 6.2 from Android 11 to 10 via Fastboot Commands

downgrade nokia 6.2 to android 10

The below process will wipe off all the data from your device, so please take a complete device backup beforehand. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Install Android SDK

install adb platform tools windows

First and foremost, you will have to install the Android SDK Platform Tools on your PC. This is the official ADB and Fastboot binary provided by Google and is the only recommended one. So download it and then extract it to any convenient location on your PC. Doing so will give you the platform-tools folder, which will be used throughout this guide.

STEP 2: Download Nokia 6.2 Stock Firmware

Your next course of action should be to download the Android 1o downgrade firmware for your Nokia 6.2 device. You may grab the November build from the below link or download one of your choices from a trusted third-party site.

Android 10.0.0 SLD2290 HOME BREW (April 2020)

STEP 3: Extract Nokia 6.2 Firmware

  1. Once you have downloaded the firmware, extract it to the platform-tools folder on your PC.
  2. You will get all the required partition IMG files, which will be flashed onto your device via Fastboot Commands.
    downgrade nokia 6.2 to android 10

STEP 4: Unlock Bootloader on Nokia 6.2

Since we are about to flash the stock firmware files to their respective partitions, having the bootloader unlocked is an absolute necessity. So please refer to our guide on How to Unlock the Bootloader on Nokia 6.2.

downgrade nokia 6.2 to android 10

STEP 5: Boot Nokia 6.2 to Fastboot Mode

  1. Connect your device to the PC via USB cable. Make sure USB Debugging is enabled.
  2. Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter. This will launch the Command Prompt.
    command-prompt-inside-adb
  3. Type in the following command in the CMD window to boot your device to Fastboot Mode
    adb reboot bootloader

    downgrade nokia 6.2 to android 10

  4. To verify the Fastboot connection, type in the below command and you should get back the device ID.
    fastboot devices

    downgrade nokia 6.2 to android 10

STEP 6: Flash Android 10 Firmware on Nokia 6.2 | Downgrade It

  1. To begin with, connect your device to the PC via USB cable.
  2. Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter. This will launch the Command Prompt.
    command-prompt-inside-adb
  3. Since we are currently performing a downgrade, you will have to perform a factory reset (this will wipe off all the data from your device). So use the below command for that:
    fastboot -w
  4. Once the format is complete, proceed with the below Fastboot Commands to flash each of the files to their respective partitions, across both the slots.
  5. If any command gives out any error, then don’t leave the process mid-way. Rather, move over to the next command and carry on till the end, there’s every chance that the device would still boot up.
    fastboot flash abl_a abl.img
    
    fastboot flash abl_b abl.img
    
    fastboot flash bluetooth_a bluetooth.img
    
    fastboot flash bluetooth_b bluetooth.img
    
    fastboot flash boot_a boot.img
    
    fastboot flash boot_b boot.img
    
    fastboot flash cmnlib_a cmnlib.img
    
    fastboot flash cmnlib_b cmnlib.img
    
    fastboot flash cmnlib64_a cmnlib64.img
    
    fastboot flash cmnlib64_b cmnlib64.img
    
    fastboot flash devcfg_a devcfg.img
    
    fastboot flash devcfg_b devcfg.img
    
    fastboot flash dsp_a dsp.img
    
    fastboot flash dsp_b dsp.img
    
    fastboot flash hyp_a hyp.img
    
    fastboot flash hyp_b hyp.img
    
    fastboot flash keymaster_a keymaster.img
    
    fastboot flash keymaster_b keymaster.img
    
    fastboot flash mdtp_a mdtp.img
    
    fastboot flash mdtp_b mdtp.img
    
    fastboot flash mdtpsecapp_a mdtpsecapp.img
    
    fastboot flash mdtpsecapp_b mdtpsecapp.img
    
    fastboot flash modem_a modem.img
    
    fastboot flash modem_b modem.img
    
    fastboot flash nvdef_a nvdef.img
    
    fastboot flash nvdef_b nvdef.img
    
    fastboot flash pmic_a pmic.img
    
    fastboot flash pmic_b pmic.img
    
    fastboot flash rpm_a rpm.img
    
    fastboot flash rpm_b rpm.img
    
    fastboot flash splash_a splash.img
    
    fastboot flash splash_b splash.img
    
    fastboot flash system_a system.img
    
    fastboot flash system_b system.img
    
    fastboot flash tz_a tz.img
    
    fastboot flash tz_b tz.img
    
    fastboot flash vendor_a vendor.img
    
    fastboot flash vendor_b vendor.img
    
    fastboot flash_a xbl xbl.img
    
    fastboot flash xbl_b xbl.img
    
    fastboot reboot

The last command should automatically boot your device to the OS and with that, the rollback is complete. So with this, we round off the guide on how you could downgrade your Nokia 6.2 to Android 10 via Fastboot Commands. If you have any queries concerning the aforementioned steps, do let us know in the comments. We will get back to you with a solution at the earliest.


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