[GUIDE] How to Downgrade / Unbrick /Flash Stock Firmware Nokia 5.1 Plus.

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bx2nero

Senior Member
Apr 22, 2015
292
85
No it isn't. I've just read out from Get Started document: NOKIA 5.1 TA-1061/TA-1075 EN-EMEA-APAC. So, does it mean, that the guide is not going to work for it? Thank you for your reply.
I really cant say about Nokia 5.1
This method should work but you will need firmware for Nokia 5.1 which will have the scatter. for your device.
An u may need diff DA too.
 

Ricci33

Member
Aug 28, 2021
5
0
I really cant say about Nokia 5.1
This method should work but you will need firmware for Nokia 5.1 which will have the scatter. for your device.
An u may need diff DA too.
Sorry for late answer. I'd like to ask you, whether there is a way how to downgrade my Nokia 5.1? I am open to make an agreement with you regarding creation/preparation of scatter & DA too. Of course, only in case, that you would like to. What do you think? Is there a way?
 

braiannk1

New member
Nov 16, 2021
1
0
I am from Argentina that file from android 9 will serve me in my nokia to go back to android 9 or do I have to download a rom from my country?
 

prem kunal

New member
Aug 6, 2022
4
1
This guide is for downgrading /Unbrick /Flash Stock Firmware Nokia 5.1 plus to Android Pie or Oreo.

This is STRICTLY for Global Nokia 5.1 plus variant NOT for Chinese variant Nokia X5. If you want to downgrade Chinese variant then follow this guide by hikari_calyx
Guide For Chinese Variant (X5).

What you need ::


1.MTK- Smart Phone Flashing tool which can be downloaded here. (v5.1804) Download

2.Android platform tools and ADB and fastboot drivers . Download

3. MTK Port drivers , For windows only. Download

4.FIRMWARE -
  • Oreo - PDA-1100-0-00WW-B01_unpacked.7z from . Download
  • Pie - PDA-214A-0-00WW-B01.full.zip from here . Download

STEP 1 : Backup your important files from internal storage and remove all google accounts from your phone to prevent FRP lock.

STEP 2 : Install all drivers and files mentioned above and extract your desired Firmware .

STEP 3 : Create a full backup using SP Flash tool (must do).

Open Smart Phone Flash Tool, choose the Download Agent file and Scatter File from the unpacked firmware.
DO NOT USE DOWNLOAD AGENT FROM THE FLASH TOOL ITSELF, USE ONLY THE ONE PROVIDED IN THE FIRMWARE.

Should look like this-
View attachment 5204559




Then move to "Readback" and tap on add and choose you location where you want save you backup after that you double click on the created readback section and you will see this :

View attachment 5204565

Use any text editor to open the scatter file from extracted firmware , and find "userdata". You'll need the start address of userdata as the length of the full backup.
View attachment 5204567



And change the length from the address you found under "userdata" in scatter file like this and tap ok.

View attachment 5204569

Click on "Readback" and the connect you phone in flashing mode with both volume button pressed and release upon the readback process starts ( you can see it in the lower progress bar).

View attachment 5204571

STEP 4 : Upon completion of the readback process , close SP Flash tool and unplug you phone and trigger it to fastboot mode and change your Active partition to "a" by this command.
Open cmd to use this command.

Code:
fastboot --set-active=a

View attachment 5204573

After this process completes , power off you phone .

STEP 5 : Flashing your firmware.
Open SP Flash Tool and check that DA and Scatter is loaded from your extracted Firmware.
Choose "DOWNLOAD ONLY" mode , not any other or you will loose important partitions.
Then click on download and connect your phone in flashing mode by both volume button pressed and release upon the download process starts ( you can see it in the lower progress bar).

View attachment 5204575

After its finished, it will show "Download OK" popup.

View attachment 5204583

Now just close SP Flash tool , unplug you phone and reboot.


Enjoy your downgraded/ Unbricked Nokia 5.1+.

Special thanks to :
hikari_calyx for Firmware and solving all the errors.
Someone , Someone and Someone for testing this guide.

Hit Thanks if it worked for you. :D
Very very thanks to both of you (Hikari calyx and bx2nero). I finally downgrade it from android 10 to 8.1.0, and it becomes blezzingly fast now from that lagggy android 10 ver. , keep helping :D and one more thing during this process i found "notice that 90% of life time of storage in your device has passed, please change to new device as soon as possible. " What is its means?
 
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bx2nero

Senior Member
Apr 22, 2015
292
85
Very very thanks to both of you (Hikari calyx and bx2nero). I finally downgrade it from android 10 to 8.1.0, and it becomes blezzingly fast now from that lagggy android 10 ver. , keep helping :D and one more thing during this process i found "notice that 90% of life time of storage in your device has passed, please change to new device as soon as possible. " What is its means?
where did u see this notice ?
 

ioura

Member
Oct 23, 2016
44
6
ufa
Super! Thanks! Now, can anybody explain which gsi are suitable with the device? A? A/B? and how to flash via fastboot? I've tried to flash arrowOS to slot a, as shown on youtube, but stock firmware boots anyway(
 

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    This guide is for downgrading /Unbrick /Flash Stock Firmware Nokia 5.1 plus to Android Pie or Oreo.

    This is STRICTLY for Global Nokia 5.1 plus variant NOT for Chinese variant Nokia X5. If you want to downgrade Chinese variant then follow this guide by hikari_calyx
    Guide For Chinese Variant (X5).

    What you need ::


    1.MTK- Smart Phone Flashing tool which can be downloaded here. (v5.1804) Download

    2.Android platform tools and ADB and fastboot drivers . Download

    3. MTK Port drivers , For windows only. Download

    4.FIRMWARE -
    • Oreo - PDA-1100-0-00WW-B01_unpacked.7z from . Download
    • Pie - PDA-214A-0-00WW-B01.full.zip from here . Download

    STEP 1 : Backup your important files from internal storage and remove all google accounts from your phone to prevent FRP lock.

    STEP 2 : Install all drivers and files mentioned above and extract your desired Firmware .

    STEP 3 : Create a full backup using SP Flash tool (must do).

    Open Smart Phone Flash Tool, choose the Download Agent file and Scatter File from the unpacked firmware.
    DO NOT USE DOWNLOAD AGENT FROM THE FLASH TOOL ITSELF, USE ONLY THE ONE PROVIDED IN THE FIRMWARE.

    Should look like this-
    Screenshot from 2021-01-31 12-59-17.png



    TROUBLESHOOTING.

    If you get this error

    LIB-DA-not-match-error-min.png


    Then go to options and disable "Check LIB DA Match".

    1611928718706.png

    Then move to "Readback" and tap on add and choose you location where you want save you backup after that you double click on the created readback section and you will see this :

    Screenshot from 2021-01-31 13-03-28.png


    Use any text editor to open the scatter file from extracted firmware , and find "userdata". You'll need the start address of userdata as the length of the full backup.
    Screenshot from 2021-01-31 13-04-07.png




    And change the length from the address you found under "userdata" in scatter file like this and tap ok.

    Screenshot from 2021-01-31 13-04-36.png


    Click on "Readback" and the connect you phone in flashing mode with both volume button pressed and release upon the readback process starts ( you can see it in the lower progress bar).

    Screenshot from 2021-01-31 13-06-54.png


    STEP 4 : Upon completion of the readback process , close SP Flash tool and unplug you phone and trigger it to fastboot mode and change your Active partition to "a" by this command.
    Open cmd to use this command.

    Code:
    fastboot --set-active=a

    Screenshot from 2021-01-31 13-15-48.png


    After this process completes , power off you phone .

    STEP 5 : Flashing your firmware.
    Open SP Flash Tool and check that DA and Scatter is loaded from your extracted Firmware.
    Choose "DOWNLOAD ONLY" mode , not any other or you will loose important partitions.
    Then click on download and connect your phone in flashing mode by both volume button pressed and release upon the download process starts ( you can see it in the lower progress bar).

    Screenshot from 2021-01-31 13-43-01.png


    After its finished, it will show "Download OK" popup.

    1f97e3897519622afb94d.png


    Now just close SP Flash tool , unplug you phone and reboot.


    Enjoy your downgraded/ Unbricked Nokia 5.1+.

    Special thanks to :
    hikari_calyx for Firmware and solving all the errors.
    Someone , Someone and Someone for testing this guide.

    Hit Thanks if it worked for you. :D
    1
    Cant compltete the readback prccess what should i do?
    Which version of SP flash tool are you using ??
    1
    I used the latest version. I'm going to try again with the recommended version. Thank you .
    Use Sp flash tool version 5.1804 or 5.1824.
    Read the instructions carefully ..
    1
    How to backup using sp flashtool?
    You must backup your personal data and remove Google account before starting.
    The readback process is the backup process in SP flash tool.
    1
    Alas, no mirror found:

    https://tpedutw-my.sharepoint.com/:...dFks--5G6V4vYBGTwLw1BsthbtIuJqMUN3tQ?e=wOfytH


    Try from here
    Make sure you download the file mentioned.
    PDA_214A_0_00WW_B01_full