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[RECOVERY][UNOFFICIAL] TWRP for Galaxy S21 (Exynos)

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EmRav

Senior Member
Jun 4, 2012
134
38
For the first step, unlock bootloader, I triggered an update. Do I really need to wait seven days now for OEM Unlock to show on Developer Settings or is there a way around this?
 

afaneh92

Senior Member
Jul 31, 2012
2,938
4,599
What is this trick you speak of good sir lol? I've been with OnePlus for a few years, my Samsung game is weak these days.
US/Canada devices has no oem unlock toggle!

How to get OEM Unlock option back for Non US/Canada device?
1. Open the Settings app. Tap on General Management → Date and time.
2. Use the toggle button to disable Automatic date and time.
3. Set date option will be enabled now. Tap on it, and set the date to about 10-20 days earlier.
4. Enable developer options.
4.a Go to your device Settings.
4.b Select ‘About phone’ » tap seven times on ‘Build number’.
└ This will enable Developer options under Settings.
4.c Go back to Settings » scroll down to the bottom and you’ll see Developer options menu.
5. Open developer options (in the Settings app itself), and find the option called ‘Auto update system‘. Use the toggle button to disable it.
6. Now, go back to the main screen of Setting, and then tap on Software update.
7. Disable the option ‘Download updates automatically‘.
8. Tap on ‘Download updates manually‘ option, but it will give you an error because of the wrong date, so it’s fine.
9. Restart the device.
10. Go to Settings > Developer options. The OEM unlock option should be enabled now.
 
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EmRav

Senior Member
Jun 4, 2012
134
38
US/Canada devices has no oem unlock toggle!

How to get OEM Unlock option back for Non US/Canada device?
1. Open the Settings app. Tap on General Management → Date and time.
2. Use the toggle button to disable Automatic date and time.
3. Set date option will be enabled now. Tap on it, and set the date to about 10-20 days earlier.
4. Enable developer options.
4.a Go to your device Settings.
4.b Select ‘About phone’ » tap seven times on ‘Build number’.
└ This will enable Developer options under Settings.
4.c Go back to Settings » scroll down to the bottom and you’ll see Developer options menu.
5. Open developer options (in the Settings app itself), and find the option called ‘Auto update system‘. Use the toggle button to disable it.
6. Now, go back to the main screen of Setting, and then tap on Software update.
7. Disable the option ‘Download updates automatically‘.
8. Tap on ‘Download updates manually‘ option, but it will give you an error because of the wrong date, so it’s fine.
9. Restart the device.
10. Go to Settings > Developer options. The OEM unlock option should be enabled now.
I've already enabled Developer Settings and updated. Do I need to restart and factory reset?
 

bigtom624

Senior Member
Jun 23, 2010
1,597
814
Philadelphia Pa.
I installed TWRP no problem and was able to root also but after flashing a custom Rom I can't download anything at all. I keep getting a storage error
 

Shakil Uddin

Member
Feb 19, 2021
7
0
When i backup from twrp, shows this error
 

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okwhateverok

Senior Member
Sep 21, 2014
52
26
Amsterdam
about the nandroid backup 255 error please have a look at this thread for a possible fix but it looks like a TWRP bug because of the need for a fingerprint or code to decrypt the partition, the OP says there is a encryption bug.
And please try the 3.6.0 version released last Monday also in the OP with many thanks.

 
Last edited:

okwhateverok

Senior Member
Sep 21, 2014
52
26
Amsterdam
Today i did receive my brand new S21 and did try to root it thru TWRP immediately but with no success.
I updated the phone to Firmware version G991BXXS3AUJ7 because this is the latest version of android 11, i didnt want to update to the latest which is android 12.
After unlock the bootloader and reboot to download mode i did try to flash the provided files but it failed.
What could be the issue, is it the TWRP.tar and the Multidisabler.tar from the developer or is the firmware not supported?

Error1.jpg
 
Last edited:

afaneh92

Senior Member
Jul 31, 2012
2,938
4,599
Today i did receive my brand new S21 and did try to root it thru TWRP immediately but with no success.
I updated the phone to Firmware version G991BXXS3AUJ7 because this is the latest version of android 11, i didnt want to update to the latest which is android 12.
After unlock the bootloader and reboot to download mode i did try to flash the provided files but it failed.
What could be the issue, is it the TWRP.tar and the Multidisabler.tar from the developer or is the firmware not supported?

View attachment 5476003
Connect to internet
 

okwhateverok

Senior Member
Sep 21, 2014
52
26
Amsterdam
thank you for your reply, my laptop is connected to the internet and the phone was connected to the internet too because i did the update to the latest android 11 version from the phone itself, so i don't understand connect to internet...

My other question is what is the latest exact android version this TWRP is supported to work on correctly? is android 12 supported already?
 

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  • 1
    Hello, thanks for this job, you are the best !!!
    if my s21 is already rooted via magisk, is data formatting necessary ? When i have test this twrp, when i reboot to recovery, my internal storage is 0go !!! What is the problem ??? Sorry for my english, i'm french
    Hello, yes need to disable encryption then format.
    1
    Thanks for your rep, for confirm, encryption is disabled when i use multidisabler on terminal ?
    yes
  • 14
    home.png
    backupname.png

    Team Win Recovery Project 3.x, or twrp3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.

    Code:
     * Your warranty is now void.
    * I am not responsible for bricked devices, dead SD cards,
    * thermonuclear war, or your getting fired because the alarm app failed. Please
    * do some research if you have any concerns about features included in this ROM
    * before flashing it! YOU are choosing to make these modifications, and if
    * you point the finger at me for messing up your device, I will laugh at you.

    Supported Models:
    Galaxy S21 G991B/N.

    Download & Guide:
    1. Unlock your bootloader.
    2. Download S21: o1s.
    3. Reboot to download mode
    4. Put the TWRP TAR for your device with Odin in the AP slot, vbmeta_disabled_R.tar in USERDATA slot and click start.
    5. Reboot to recovery via recovery key combo (Vol up + power + USB connected).
    6. Disable encryption:
    - Go to Advanced > Terminal, type: multidisabler.​
    If vendor complain about free space left on device, will attempt to resize vendor. and it ask to - Run multidisabler again!.​
    - Type: multidisabler again. will see - Finished. when done.​
    - Go back to Wipe > Format Data > type yes.​
    - Reboot to recovery.​
    7. Flash magisk apk in twrp.
    8. Reboot to system, Enjoy.

    Support:
    Live support is available via #twrp on Freenode with your IRC client or just click this link.

    Telegram group

    Bugs:
    - Encryption not fully working.
    - Haptic feedback is currently not working.

    Thanks:
    TWRP team
    @ianmacd for multidisabler

    Sources:
    Kernel tree
    Device tree
    6
    Changelog:
    29.11.2021 - Update to TWRP 3.6.0
    - Updated to latest kernel source
    - Update multidisabler
    - fstab clean up
    - Fix haptic feedback
    21.08.2021 - Add Symlinked dynamic partitions to fstab
    - Fix dtbs issue from previous build
    09.08.2021 - Updated to latest kernel source
    - No vbmeta disable require
    - fstab clean up
    03.03.2021 - Initial Release.
    2
    Hi guys..

    Will this work for model G991B/DS?
    Yes
    2
    @afaneh92 The recovery supports flashing Magisk APK out-of-the-box?

    So, no need to rename the .apk to .zip anymore?
    You can flash apk
    I'm kinda casual, with haptic feedback not working do you mean the vibration motor in the phone stops working completely, or? I don't know what encryption not working means either.
    I saw the same issues for the S20 FE.

    Looking at both forums closely currently as I'm deciding which phone to buy dependent on which phone will have a better root experience.
    Vibration not working in twrp only, read more.
    Will this have to be done everytime there is a firmware update?? Or like other devices we can keep twrp and magisk when updating..
    I currently have S20 which I dont have twrp on but can update new firmware and just reboot to odin after flashing new firmware and just flash patched boot.img and all is good. Will the S21 be the same
    Yes need to redo every step.