How To Guide How To: Root Galaxy A12 | SM-A125F/DSN

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Edit: I've realized I wasn't actually bootloader unlocked once I say this post: https://forum.xda-developers.com/t/how-to-unlock-bootloader.4244757/post-85085247


I've followed every step, and had success until... the very last one where Odin throws an error when flashing to PDA with the new boot.img.tar - "NAND Write Start!!" / RQT_CLOSE!!" in Odin and "SW REV CHECK FAIL : [boot]" "Fused 1 > Binary 0" and "SECURE CHECK FAIL : : boot" on the phone in download mode.

I'd really appreciate any tips on what I'm doing wrong...
I think this error occurs when you try to downgrade the bootloader. The 5th number of CSC reading from the right side is the bootloader version. That number of new firmware should be equal or greater than the one from the current firmware.
 
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Venketesh Benke

New member
Apr 15, 2021
2
0
This is the Method how i Root my Galaxy A12 .
This method is very easy if you take your time. THIS WILL ALSO WIPE YOUR DEVICE. I AM NOT RESPONSIBLE FOR ANY DEVICE OR SD CARD DAMAGE.

BEFORE PROCEEDING, UNLOCK BOOTLOADER.

YOU CAN FIND THE FIRMWARE YOU NEED ON SAMMOBILE.

1. Download the firmware for your device.
2. Load Zarchiver from playstore.
3. Open Zarchiver and locate the firmware you downloaded.
4. Click on the firmware, a menu will appear at the bottom. You will then have option to extract.
5. Extract the firmware and you will have files..AP..BL..CP..CSC..and HOME_CSC. The only file we need is AP
6. Click on AP file and rename AP_A125FXX.md5 to AP_A125FXX.tar - so your just highlighting the file and removing md5 so it only says .tar at the end.
7. Once you have renamed AP file click and again you will be given the option to extract. Once extracted, locate boot.img.lz4
8. Then extract boot.img.lz4 leaving you with boot.img
9. You should have Magisk manager installed on device. Use Magisk to patch the boot.img. once patched locate magisk_patched.img and rename to boot.img
10. Return to Zarchiver locate the patched boot.img and compress to boot.tar.
11. Move compressed boot.tar to computer and rename to boot.img.tar
12. Put device in download mode, open Odin and put the boot.img.tar in AP and click start. Once odin says pass, your device will boot to stock recovery and you will have to do a factory reset so save anything you need before doing this.
13. Once Device boots - RE-install Magisk Manager and follow prompts.

Congatulations, Youre Rooted Now.

View attachment 5244935
What are the prom
This is the Method how i Root my Galaxy A12 .
This method is very easy if you take your time. THIS WILL ALSO WIPE YOUR DEVICE. I AM NOT RESPONSIBLE FOR ANY DEVICE OR SD CARD DAMAGE.

BEFORE PROCEEDING, UNLOCK BOOTLOADER.

YOU CAN FIND THE FIRMWARE YOU NEED ON SAMMOBILE.

1. Download the firmware for your device.
2. Load Zarchiver from playstore.
3. Open Zarchiver and locate the firmware you downloaded.
4. Click on the firmware, a menu will appear at the bottom. You will then have option to extract.
5. Extract the firmware and you will have files..AP..BL..CP..CSC..and HOME_CSC. The only file we need is AP
6. Click on AP file and rename AP_A125FXX.md5 to AP_A125FXX.tar - so your just highlighting the file and removing md5 so it only says .tar at the end.
7. Once you have renamed AP file click and again you will be given the option to extract. Once extracted, locate boot.img.lz4
8. Then extract boot.img.lz4 leaving you with boot.img
9. You should have Magisk manager installed on device. Use Magisk to patch the boot.img. once patched locate magisk_patched.img and rename to boot.img
10. Return to Zarchiver locate the patched boot.img and compress to boot.tar.
11. Move compressed boot.tar to computer and rename to boot.img.tar
12. Put device in download mode, open Odin and put the boot.img.tar in AP and click start. Once odin says pass, your device will boot to stock recovery and you will have to do a factory reset so save anything you need before doing this.
13. Once Device boots - RE-install Magisk Manager and follow prompts.

Congatulations, Youre Rooted Now.

View attachment 5244935
What are the prompts we have to follow sir.. After re-installing magisk
 

flovlist

Member
Feb 16, 2015
7
0
For me it doesn't work, followed all the steps, did it with boot.img only, with complete AP file, with custom boot.img from website but every time I end up on the start up screen and nothing happens. It doesn't boot and after couple of minutes it reboots.
I have the A127FXXU1AUF8 model/firmware but was not able to reboot.
Do you know any other way to root the android 11 samsung a12 without using Magisk?
 

LAST_krypton

Senior Member
For me it doesn't work, followed all the steps, did it with boot.img only, with complete AP file, with custom boot.img from website but every time I end up on the start up screen and nothing happens. It doesn't boot and after couple of minutes it reboots.
I have the A127FXXU1AUF8 model/firmware but was not able to reboot.
Do you know any other way to root the android 11 samsung a12 without using Magisk?
Try to do the same thing with other fimware, or even try rooting through a custom recovery.
 

flovlist

Member
Feb 16, 2015
7
0
Try to do the same thing with other fimware, or even try rooting through a custom recovery.
Yeah I already flashed different firmware but that didn't help either.
Maybe I can try to install the unofficial TWRP but it looks like that one is for the A125F model which had some different hardware than then A127F so I don't think that is a good idea.
I can also try to flash the android 10 firmware and hope that that helps, I don't think that downgrading while flashing a complete different android version should be a problem, or is it?
 

Kairobot

New member
Sep 7, 2021
1
0
Hi! Should i patch the boot.img.lz4 or should i remove the .lz4 first? Just starting out pls help
 

LAST_krypton

Senior Member
does this work for the a125w model?
If you can unlock the bootloader, yes.
 

PAOLO_1

Member
Jan 23, 2022
6
0
Hello I did everything according to the instructions but unfortunately no success I get an error message

20220124_144547.jpg 20220124_144526.jpg Screenshot_20220124-145159_Settings.jpg
 
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PAOLO_1

Member
Jan 23, 2022
6
0
I've tried everything and no success it's just a waste of time


download the mod apps and enjoy it instead of playing around with stuff like that :)
 

TheEND009

New member
Feb 12, 2022
2
0
Will this method work on Samsung A12 SM-S127DL Straight Talk version? Root seems to be my only option to make SD internal storage for games/apps a viable solution.
 

mieucun123

Member
Feb 17, 2022
6
0
help me
My phone show me this
ODIN MODE (DT Load Fail)!
[UFDT] DT Entry: not found rev 0x1
[UFDT] DTB Load Fail
 

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  • 6
    This is the Method how i Root my Galaxy A12 .
    This method is very easy if you take your time. THIS WILL ALSO WIPE YOUR DEVICE. I AM NOT RESPONSIBLE FOR ANY DEVICE OR SD CARD DAMAGE.

    BEFORE PROCEEDING, UNLOCK BOOTLOADER.

    YOU CAN FIND THE FIRMWARE YOU NEED ON SAMMOBILE.

    1. Download the firmware for your device.
    2. Load Zarchiver from playstore.
    3. Open Zarchiver and locate the firmware you downloaded.
    4. Click on the firmware, a menu will appear at the bottom. You will then have option to extract.
    5. Extract the firmware and you will have files..AP..BL..CP..CSC..and HOME_CSC. The only file we need is AP
    6. Click on AP file and rename AP_A125FXX.md5 to AP_A125FXX.tar - so your just highlighting the file and removing md5 so it only says .tar at the end.
    7. Once you have renamed AP file click and again you will be given the option to extract. Once extracted, locate boot.img.lz4
    8. Then extract boot.img.lz4 leaving you with boot.img
    9. You should have Magisk manager installed on device. Use Magisk to patch the boot.img. once patched locate magisk_patched.img and rename to boot.img
    10. Return to Zarchiver locate the patched boot.img and compress to boot.tar.
    11. Move compressed boot.tar to computer and rename to boot.img.tar
    12. Put device in download mode, open Odin and put the boot.img.tar in AP and click start. Once odin says pass, your device will boot to stock recovery and you will have to do a factory reset so save anything you need before doing this.
    13. Once Device boots - RE-install Magisk Manager and follow prompts.

    Congatulations, Youre Rooted Now.

    Screenshot_20210309-182256_Root Checker Basic.jpg
    2
    28.3.2021: Download of patched boot.img.tar failed with error:
    SW REV CHECK FAIL : [boot]Fused 1 > Binary Only official released binaries are allowed to be flashed : boot

    KG STATUS : PRENORMAL was the culprit. For naive users inexperienced with Samsung devices like myself might be usefull to have warning in the rooting guide to avoid PRENORMAL state and link to instructions how to do it.

    Update 8.4.2021: To get rid of PRENORMAL state is enough to wait for a week with sim, active data connection and maybe also logged into google account. Do not reboot or disconnect network during wait time. Check the OEM ulocking state in developer settings time to time (to trigger status verification on Samsung servers).

    Flashing unofficial binary succeeded afterwards.

    Sources:
    https://milankragujevic.com/how-to-avoid-rmm-state-prenormal-when-unlocking-samsung-phones
    https://forum.xda-developers.com/t/...ll-twrp-on-exynos-samsung-after-2018.3747535/
    1
    It worked! Thank you so much for this tutorial! 😍
    1
    Ive tried searching for my firmware on sammobile however im not finding it. Its model sm-a125u doesnt even show up on their list.