[RECOVERY][UNOFFICIAL] TWRP for Galaxy S21 5G (Snapdragon)

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afaneh92

Senior Member
Jul 31, 2012
2,294
4,190
203
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 G9910, G991U, G991U1 and G991W.

US/Canada bootloader unlock thread:
here

Download & Guide:
1. Unlock your bootloader.
2. Download S21: o1q.
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
 
Last edited:

afaneh92

Senior Member
Jul 31, 2012
2,294
4,190
203
Changelog:
03.04.2021 - Fix MTP thanks to klabit87.
08.03.2021 - Working TWRP!
03.03.2021 - Initial Release (broken).
 
Last edited:
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Jnewell05

Senior Member
May 22, 2009
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I've flashed this 2x times on my galaxy s21 with freshly unlocked bootloader and get stuck in an endless bootloop. I used the stock image to recover via odin sucessfully. L "Put the TWRP TAR for your device with Odin in the AP slot, vbmeta_disabled_R.tar in USERDATA slot and click start." Anyone else have luck with this step? Using odin 3.14.1_3B_patched succeeds successfully. I get red text on Samsung splash screen saying the os is custom blah blah blah. Instead of entering recovery while holding volume up and power with USB inserted or booting up, it bootloops. I haven't tried just twrp or the vbmeta separately yet.
 

afaneh92

Senior Member
Jul 31, 2012
2,294
4,190
203
I've flashed this 2x times on my galaxy s21 with freshly unlocked bootloader and get stuck in an endless bootloop. I used the stock image to recover via odin sucessfully. L "Put the TWRP TAR for your device with Odin in the AP slot, vbmeta_disabled_R.tar in USERDATA slot and click start." Anyone else have luck with this step? Using odin 3.14.1_3B_patched succeeds successfully. I get red text on Samsung splash screen saying the os is custom blah blah blah. Instead of entering recovery while holding volume up and power with USB inserted or booting up, it bootloops. I haven't tried just twrp or the vbmeta separately yet.
what is your model?
 

Nor|shoR

New member
Mar 7, 2021
3
5
13
Hi! First of all, great work!
I want to confirm that what happened to Jnewell05 happened to #metoo :ROFLMAO: . I have a Samsung S21 5G Snapdragon - SM-G9910 running latest OTA update from March - G9910ZHU1AUB7- and BRI - CSC (if that counts). Like in our coleague case, flashing stock rom, reboots just fine.

LE: for a verry brief moment, just before the moment that recovery should "kick in", a yellow message appears in a flash and is says something about "Security BIT" - couldn`t read entirely because it appears and dissapears, as I sayd: in a flash. I hope this helps the cause.

LE2: The message about I was talking is: Set Warranty Bit : Vmeta. After that, just the red message and yellow exclamation mark and bootloop
 
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scott.hart.bti

Inactive Recognized Developer
Mar 19, 2012
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Hello galaxy world. Will this procedure cause any issues with future Samsung OTA updates? Sorry if the question is a bit newbish. Been strictly oneplus for the past 6+ years and finally jumping ship. My unlocked s21 is coming later this week... Stoked to see y'all got this figured out.
 

afaneh92

Senior Member
Jul 31, 2012
2,294
4,190
203
Hello galaxy world. Will this procedure cause any issues with future Samsung OTA updates? Sorry if the question is a bit newbish. Been strictly oneplus for the past 6+ years and finally jumping ship. My unlocked s21 is coming later this week... Stoked to see y'all got this figured out.
Hello, yes modification to any partition will fail to take OTA, anyway if you are getting US device unlock only work on rev. 1 bootloader for now.
 
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  • 1
    Hello galaxy world. Will this procedure cause any issues with future Samsung OTA updates? Sorry if the question is a bit newbish. Been strictly oneplus for the past 6+ years and finally jumping ship. My unlocked s21 is coming later this week... Stoked to see y'all got this figured out.
    Hello, yes modification to any partition will fail to take OTA, anyway if you are getting US device unlock only work on rev. 1 bootloader for now.
    1
    Time to really show my inexperience. Received my phone today. G9991u1. You mentioned about only working on rev1 bootloader. Where would you confirm bootloader is rev1?
    Settings > about phone > software info
    5th character from the right on build numbers or baseband version
    1
    Ah ok... so my baseband shows g991u1ueu2aub6... 5th from the left is 1. So in theory, I should be good to proceed with your instructions in post 1 correct?
    Oh sorry I was meant to say right but I said left lol, version 2 is not unlockable.
  • 3
    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 G9910, G991U, G991U1 and G991W.

    US/Canada bootloader unlock thread:
    here

    Download & Guide:
    1. Unlock your bootloader.
    2. Download S21: o1q.
    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
    2
    contact me on telegram @ afaneh92 for tetsing
    1
    Changelog:
    03.04.2021 - Fix MTP thanks to klabit87.
    08.03.2021 - Working TWRP!
    03.03.2021 - Initial Release (broken).
    1
    Thanks a lot for my snapdragon
    1
    Galaxy S21 unlocked XAA SM-G991U1
    Wait for a fix tonight. Thanks for report.
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