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

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afaneh92

Senior Member
Jul 31, 2012
3,157
4,730
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
3,157
4,730
Changelog:
15.01.2022 - Update kernel to BUK7
- Fix TWRP boot delay
- Update multidisabler to support new Android 12 fstab
- fstab clean up
29.11.2021 - Update to TWRP 3.6.0
- Add Symlinked dynamic partitions to fstab
- Update multidisabler
- fstab clean up
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
610
100
Texas
Samsung Galaxy S21
Google Pixel 6
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
3,157
4,730
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
6
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
2,532
17,324
Reading
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
3,157
4,730
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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    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
    Changelog:
    15.01.2022 - Update kernel to BUK7
    - Fix TWRP boot delay
    - Update multidisabler to support new Android 12 fstab
    - fstab clean up
    29.11.2021 - Update to TWRP 3.6.0
    - Add Symlinked dynamic partitions to fstab
    - Update multidisabler
    - fstab clean up
    03.04.2021 - Fix MTP thanks to klabit87.
    08.03.2021 - Working TWRP!
    03.03.2021 - Initial Release (broken).
    2
    Guys this is twrp thread, not magisk.
    If you have problems with magisk submit your issue to johnwu.
    If this problems related to twrp let me know!
    2
    Did u try it with A12 on? or still waiting for an answer?
    Yes latest build support android 12
    2
    contact me on telegram @ afaneh92 for tetsing