Root m21 letest android 11 one UI 3

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IamRajnaik

Member
Nov 22, 2020
33
7
Samsung Galaxy M21

Aditya118

New member
Apr 10, 2021
1
0
Samsung Galaxy M21
Read everything carefully

This method is for if u already rooted m21 and unlocked bootloader and not able to update device

If you not rooted or unlocked bootloader your m21 before
And updated to letest android 11
Good news ..just follow my last thred and put there letest file given below

1.Create full device backup using smart switch (pc)
2.Download letest m21 android 11 firmware (which is around 4 GB)
3.Flash all those files using Odin
(Make sure u use HOME.CSC IT WILL not delete your files)
4.Restart phone
Follow everything it says in biggining without internet

8. Now oem unlock option must come in developer setting


9.turn off phone ..go to download mode
Flash file which is given below

That's it
https://t.me/SamsungGalaxyM21Discussion/135695
what's the method for one ui core version 3.1
 

OldNoobOne

Senior Member
For letest m21 android 11

Working Saaar! :love: ( Galaxy M21 2021 Edition | SM-M215G/DS )

UPDATE1:
1> :cry: Bootloop happened
2> Then Stock Recovery screen came up- Erase App Data!
3> Then Reboot happened (Safe Mode) , asked to Factory Reset
4> Factory Rest done.
5> Now not booting (ONLY OFFICIAL RELEASED BINARIES ALLOWED TO BE FLASHED Message)
I will try again.
 
Last edited:

IamRajnaik

Member
Nov 22, 2020
33
7
Samsung Galaxy M21
Working Saaar! :love: ( Galaxy M21 2021 Edition | SM-M215G/DS )

UPDATE1:
1> :cry: Bootloop happened
2> Then Stock Recovery screen came up- Erase App Data!
3> Then Reboot happened (Safe Mode) , asked to Factory Reset
4> Factory Rest done.
5> Now not booting (ONLY OFFICIAL RELEASED BINARIES ALLOWED TO BE FLASHED Message)
I will try again.
Don't do anything.....tell me whats problem now ?
Text me on telegram @Rajnaik1999
 

OldNoobOne

Senior Member
Don't do anything.....tell me whats problem now ?
Text me on telegram @Rajnaik1999
Oh but I already ODIN flashed stock boot.img tar ☹️, I saw your reply just now (thanks). then phone rebooted, then I had flashed your magisk patched file again, magisk updated a few times, then on v23 now, but the whole issue is OneUI 3.1 sar, it is not allowing much change :cry:. New custom ROM i'm searching but device very new. Okay I will add u in t.me (y). Thanks sar 🙏
 

MurderedVoid

New member
Jul 12, 2021
4
2
Working Saaar! :love: ( Galaxy M21 2021 Edition | SM-M215G/DS )

UPDATE1:
1> :cry: Bootloop happened
2> Then Stock Recovery screen came up- Erase App Data!
3> Then Reboot happened (Safe Mode) , asked to Factory Reset
4> Factory Rest done.
5> Now not booting (ONLY OFFICIAL RELEASED BINARIES ALLOWED TO BE FLASHED Message)
I will try again.
The solution is pretty easy. (I had the same problem while flashing twrp and Custom ROM on this particular device)

Whenever this happens, OEM unlocking option in developer options is not visible.
(even if you have unlocked the bootloader.)

Solution:


Enable WiFi, then going to settings changing the date and time by 10 days and finally go to check for updates and tap on update (it will say "error" or "failed to install" or something similar. Don't worry, this is expected.)
Next go to developer option and you can see OEM unlocking is now visible.

To test if its working, try flashing something.

If its still not working then your Knox Security (e-fuse) has tripped. You can't do anything apart from going to a repair center or manufacturer.
 
Last edited:
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Fredin_

Senior Member
Feb 19, 2018
279
76
Samsung Galaxy M21
Hello there, i want to root my m21 samsung android 11. I have never rooted my fon before. I turned on developer mode and oem unlocking. What to do now? Should i flash this attached file using odin? Is it okay or i have to unlock bootloader? Plz reply asap
No, You need to unlock your bootloader first.
But I don't recommend flashing those files if you have updated your device after February. It probably will work, but ideally you want to flash the magisk zip from recovery.
 

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  • 1
    Read everything carefully

    This method is for if u already rooted m21 and unlocked bootloader and not able to update device

    If you not rooted or unlocked bootloader your m21 before
    And updated to letest android 11
    Good news ..just follow my last thred and put there letest file given below

    1.Create full device backup using smart switch (pc)
    2.Download letest m21 android 11 firmware (which is around 4 GB)
    3.Flash all those files using Odin
    (Make sure u use HOME.CSC IT WILL not delete your files)
    4.Restart phone
    Follow everything it says in biggining without internet

    8. Now oem unlock option must come in developer setting


    9.turn off phone ..go to download mode
    Flash file which is given below

    That's it
    https://t.me/SamsungGalaxyM21Discussion/135695
    1
    Thanks a lot. It's working fine in one ui 3.0 . I rooted my m21 for adblocking mainly. Can you suggest some adblocking Magick module? Not apk.
    Energised module ...is best...even block ads from ap
    1
    and what abot Ainur Narsil? volume buttons are not working after install this module. any help or idea regarding this?
    Ya ainur narsil don't work
    Bu ainur sauron installed properly and working fine
    1
    Thanks a lot. It's working fine in one ui 3.0 . I rooted my m21 for adblocking mainly. Can you suggest some adblocking Magick module? Not apk.
    You can adblock without rooting thanks to some using 3rd parties DSN service providing (DNS-over-TLS), I use adguard (russian based) by adding "dns.adguard.com" as a private DNS in "settings > connections > more connection settings > Private DNS". there are other services. NexdDNS is another service that I come accross.