[RECOVERY][UNOFFICIAL] TWRP for Galaxy S20 Series (Snapdragon)

[josephgrab]

I was finally able to get this done on SM-G9810. I thought it was Exynos and was using x1s twrp, now I am using x1q. However, the system_root folder is read only. I have root with Magisk and set it to allow root for apps and adb. When I am in adb shell, whoami returns root. However, I cannot overwrite /system_root/system/framework/services.jar with a modified one to allow signature spoofing for microg. I could not use twrp-3.4, I had to use twrp-3.6.0_11-4_afaneh92-x1q.tar.

I have tried file manager in twrp, it says error. Terminal says resource is busy. adb on windows computer says file system is read only. I am trying to remount, but that is not working.

 

[josephgrab]

I did this process on S10 and S10e (both Exynos). I had no trouble overwriting the system_root folder. What keeps this folder as read-only? Is it the vbmeta (I don't know what that does), or do I need to write some modified fstab (I don't even know what that means)? How would I go about doing this? I am not a developer, I don't know the computer languages, but I am fairly good at following instructions.

 

[afaneh92]

I did this process on S10 and S10e (both Exynos). I had no trouble overwriting the system_root folder. What keeps this folder as read-only? Is it the vbmeta (I don't know what that does), or do I need to write some modified fstab (I don't even know what that means)? How would I go about doing this? I am not a developer, I don't know the computer languages, but I am fairly good at following instructions.

# mount r/w in twrp
adb shell mount /dev/block/mapper/system /system_root
adb shell mount /dev/block/mapper/vendor /vendor
# mount r/w in  twrp terminal
mount -o remount,rw /vendor
mount -o remount,rw /system_root
# mount r/w in booted system
adb shell su -c mount -o remount,rw /vendor
adb shell su -c mount -o remount,rw /

 

[josephgrab]

Thank you so much for your help. I am rooted with magisk. I do not have superuser installed (is there one?). I cannot find a comma in twrp terminal, so I typed the twrp terminal commands in adb shell. It looked like this:

C:\Program Files (x86)\Minimal ADB and Fastboot>adb root

C:\Program Files (x86)\Minimal ADB and Fastboot>adb shell mount /dev/block/mapper/system /system_root
mount: /dev/block/mapper/system: need -t

C:\Program Files (x86)\Minimal ADB and Fastboot>adb shell mount /dev/block/mapper/vendor /vendor
mount: /dev/block/mapper/vendor: need -t

C:\Program Files (x86)\Minimal ADB and Fastboot>mount -o remount,rw /vendor
'mount' is not recognized as an internal or external command,
operable program or batch file.

C:\Program Files (x86)\Minimal ADB and Fastboot>adb shell
x1q:/ # whoami
root
x1q:/ # mount -o remount,rw /vendor
x1q:/ # mount -o remount,rw /system_root
x1q:/ # su -c mount -o remount,rw /vendor
/system/bin/sh: su: inaccessible or not found
127|x1q:/ # su -c mount -o remount,rw /
/system/bin/sh: su: inaccessible or not found
127|x1q:/ #

I don't know what the need -t means, and I probably need su. As you can see, I do have root enabled in adb commands in magisk.

 

[josephgrab]

Even though I don't understand this and these errors are present, when I went to file manager in TWRP and moved services.jar from the sd card to system_root/system/framework, it completed! Thank you very much!

 

[hasanal.noman]

Hi,
Please someone help me.
My device is S20 5g snapdragon SCG01 (SM-G981J)
does this device have e-sim?
esim feature is not enabled on this device.
so i want to install custom rom which have esim option. please help me... how to root my device

 

[hasanal.noman]

Does this methos work in SM-G981J
please confirm

 

[afaneh92]

Hi,
Please someone help me.
My device is S20 5g snapdragon SCG01 (SM-G981J)
does this device have e-sim?
esim feature is not enabled on this device.
so i want to install custom rom which have esim option. please help me... how to root my device

wrong thread to ask

 

[domina]

Is there an Android 13 version planned?

 

[afaneh92]

Is there an Android 13 version planned?

Planned! TWRP is independent

 

[sidmuer]

Any way to root an att sm-g986U (s20+ 5g) ATT branded usa
I want to use it in Canada.
Or at the very least change the csc to Canada (xac) so I can rid that att logo and get ota updates

 

[afaneh92]

Any way to root an att sm-g986U (s20+ 5g) ATT branded usa
I want to use it in Canada.
Or at the very least change the csc to Canada (xac) so I can rid that att logo and get ota updates

Can be unlocked on v1 bootloader.
Otherwise flash G986W firmware

 

[sidmuer]

Can be unlocked on v1 bootloader.
Otherwise flash G986W firmware

Already installed android 13 from here:

(ROM) (OFICIAL) Android 13 One UI 5.0 for S20+ 5g Snapdragon (SM-G986U and SM-G986U1)

Hello friends! I share a link so that you can update your S20+ 5G, this firmware is for the SM-G986U and SM-G986U1. Samsung Android USB Driver for Windows v1.7.59 >Descarga Aqui< Successful update using Odin 3.13.3 >Descarga Odin Aqui

forum.xda-developers.com

But last update was Feb 2022 with Android 12 so it was already past BL V1.
OK I'll get 986w from frija.
Do I also include all the files from friga with Canadian csc? Just want to be sure to avoid brick issues.
I'm guessing I will also need to use a modded Odin to get this pushed thru?

Thanks for the info / help!

 

[afaneh92]

Already installed android 13 from here:

(ROM) (OFICIAL) Android 13 One UI 5.0 for S20+ 5g Snapdragon (SM-G986U and SM-G986U1)

Hello friends! I share a link so that you can update your S20+ 5G, this firmware is for the SM-G986U and SM-G986U1. Samsung Android USB Driver for Windows v1.7.59 >Descarga Aqui< Successful update using Odin 3.13.3 >Descarga Odin Aqui

forum.xda-developers.com

But last update was Feb 2022 with Android 12 so it was already past BL V1.
OK I'll get 986w from frija.
Do I also include all the files from friga with Canadian csc? Just want to be sure to avoid brick issues.
I'm guessing I will also need to use a modded Odin to get this pushed thru?

Thanks for the info / help!

Yes, flash all files from W firmware

 

[sidmuer]

Yes, flash all files from W firmware

Thanks. I'll give it a go when the next update / security hits!

 

[Snapwolf]

Hello everyone I've a little doubt if my phone is a Korean snapdragon I presume the bootloader can be unlocked and it has gotten the Android 13 update is the process staying the same?

 

[afaneh92]

Hello everyone I've a little doubt if my phone is a Korean snapdragon I presume the bootloader can be unlocked and it has gotten the Android 13 update is the process staying the same?

Korean has letter N in the 5th character like G988N

 

[Snapwolf]

Korean has letter N in the 5th character like G988N

Exactly

 

[Yash12328]

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.
Note: My TWRP builds are free I take no money or selling them, The new builds support US devices unlocked before 9 november or added upon request.

Supported Models:
Galaxy S20 Ultra G9880, G988N, G988U, G988U1 and G988W.
Galaxy S20 plus G9860, G986N, G986U, G986U1 and G986W.
Galaxy S20 G9810, G981N, G981U, G981U1 and G981W.

US/Canada bootloader unlock thread:
here

Download & Guide:
1. Unlock your bootloader.
2. Download S20: x1q, S20+: y2q or S20 Ultra z3q.
3. Reboot to download mode and flash vbmeta_disabled.tar in AP slot and reboot. Device will reboot to stock recovery mode prompting you to wipe data so wipe data and reboot to download mode again.
4. Put the TWRP tar for your device with Odin in the AP slot and click start.
5. Reboot to recovery via recovery key combo.
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.​

7. Go back to Wipe > Format Data > type yes.
8. Reboot to recovery.
9. Flash magisk apk in twrp.
10. Reboot to system, Enjoy.

Note:

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.

Thanks:
TWRP team
@jesec for kernel source and unlock guide
@ianmacd for multidisabler
@sac23 and @elliwigy for testing on S20 Ultra G988U and G986U

Sources:
Kernel tree
Device Tree:
x1q
y2q
z3q

Scg02 supported?

 

[afaneh92]

Scg02 supported?

y2q, yes