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Problems with rooting, loading ROM then recovery & download images -some solutions

Problems with rooting, loading ROM then recovery & download images -some solutions
I started with stock LG v20 T-Mobile H91810P and followed this step by step & the original threads. I loaded the latest stock Oreo from H91820H from here instead of latest Nougat H91810U - Pie & some other versions had too many things not working.
In the process there were a few problems -the major ones are following with solutions, some from here:
1) The file H91810p rom (H91810p_00_0717.kdz) downloaded from here.
2) I lost root several times, but had TWRP. So I used adb sideload like:
Boot/start TWRP and the start ADB Sideload
Download Magisk-v16.0.zip and copy to adb directory.
On Windows PC connect Cell with USB and in CMD window type (copy/paste):
adb start-server
adb sideload "Magisk-v16.0.zip"​And never update migisk after installing from above or will lose root. Also no need for SU.
3. Camera did not work and people could not hear me nor could I hear them when I picked up a call - A reboot/restart fixed it.
4. No need to download UPPERCUT (that is hard to download), because LGUP works fine without UPPERCUT.
I have 4 problems remaining -any help for solutions here is appreciated - especially exact type help please:
1) On LAF/Boot (original download) partition: Vol+ & connect to USB caused the download mode to come on for about 2 seconds and then TWRP (however I am glad that TWRP is here) -Prefer this to be the original download mode.
2) On Recovery patition: Vol- & connect to USB causes fastboot to come up. Flashed the recovery-twrp-h918-2018-10-18.img (renamed to recovery.img) to recovery partition using flashify and TWRP unsuccessfully. -Prefer this to be TWRP.
3) TWRP cannot access the Data partition. Rebuilt and reformatted Data from TWRP without success. -Prefer access to Data from TWRP.
4) At boot time: I like to get rid of the warning that my bootloader is unlocked. -I can live with this one.
After thoughts: Now that I am rooted on the latest stock Oreo H91820H -I am not sure what I want to load that I could not before?! overclocking the CPU or changing the hue on the display is not a big deal for me at all. & Yes I will uninstall some bloatware - but that is not so bad on this phone anyhow. Any good ideas or a better/later rom than H91820H that has all things working, do please let me know. I am glad that I rooted, ahh the challenge, but if I have no other reason such as to load a program then I think I will revert back to stock and unlock the bootloader & let the ROM updates come from T-Mobile & LG.
-Shahin

shahinman said:
I started with stock LG v20 T-Mobile H91810P and followed this step by step & the original threads. I loaded the latest stock Oreo from H91820H from here instead of latest Nougat H91810U - Pie & some other versions had too many things not working.
In the process there were a few problems -the major ones are following with solutions, some from here:
1) The file H91810P that needs to be reloaded was missing in original links - I think I downloaded from here.
2) I lost root several times, but had TWRP. So I used adb sideload like:
Boot/start TWRP and the start ADB Sideload
Download Magisk-v16.0.zip and copy to adb directory.
On Windows PC connect Cell with USB and in CMD window type (copy/paste):
adb start-server
adb sideload "Magisk-v16.0.zip"
And never update migisk after installing. Also no need for SU.
3. Camera did not work and people could not hear me nor could I hear them when I picked up a call - A reboot/restart fixed it.
I have 4 problems remaining -any help for solutions here is appreciated - especially exact type help please:
1) On LAF/Boot (original download) partition: Vol+ & connect to USB caused the download mode to come on for about 2 seconds and then TWRP (however I am glad that TWRP is here) -Prefer this to be the original download mode.
2) On Recovery patition: Vol- & connect to USB causes fastboot to come up. Flashed the recovery-twrp-h918-2018-10-18.img (renamed to recovery.img) to recovery partition using flashify and TWRP unsuccessfully. -Prefer this to be TWRP.
3) TWRP cannot access the Data partition. Rebuilt and reformatted Data from TWRP without success. -Prefer access to Data from TWRP.
4) At boot time: I like to get rid of the warning that my bootloader is unlocked. -I can live with this one.
After thoughts: Now that I am rooted on the latest stock Oreo H91820H -I am not sure what I want to load that I could not before?! overclocking the CPU or changing the hue on the display is not a big deal for me at all. & Yes I will uninstall some bloatware - but that is not so bad on this phone anyhow. Any good ideas or a better/later rom than H91820H that has all things working, do please let me know. I am glad that I rooted, ahh the challenge, but if I have no other reason such as to load a program then I think I will revert back to stock and unlock the bootloader & let the ROM updates come from T-Mobile & LG.
-Shahin
Click to expand...
Click to collapse
You can restore download mode by flashing the zip in the original lafexploit thread, but make sure you have twrp on the recovery partition. Make sure you are on the latest version of twrp, when you flashed twrp, you were supposed to format the data partition before flashing the rom.
Sent from my LG-H910 using XDA Labs

For access to Data in TWRP: In the original thread there is nothing about formatting, but in step by step guide there is and I followed - however it does not specify what partition to format. I also ran ./step2.sh script per instructions.
Anyhow as I mentioned above I rebuilt and reformatted the Data partition and that did not give me access. I am on the TWRP 3.2.1-3. What partitions do I need to reformat anyhow?
To flash recovery: I used TWRP and flashify to flash recovery-twrp-h918-2018-10-18.img and it flashes but does not work - I get to fastboot with Vol- & USB.

shahinman said:
Problems with rooting, loading ROM then recovery & download images -some solutions
I started with stock LG v20 T-Mobile H91810P and followed this step by step & the original threads. I loaded the latest stock Oreo from H91820H from here instead of latest Nougat H91810U - Pie & some other versions had too many things not working.
In the process there were a few problems -the major ones are following with solutions, some from here:
1) The file H91810p rom (H91810p_00_0717.kdz) downloaded from here.
2) I lost root several times, but had TWRP. So I used adb sideload like:
Boot/start TWRP and the start ADB Sideload​Download Magisk-v16.0.zip and copy to adb directory.​On Windows PC connect Cell with USB and in CMD window type (copy/paste):​adb start-server​adb sideload "Magisk-v16.0.zip"​
And never update migisk after installing from above or will lose root. Also no need for SU.
3. Camera did not work and people could not hear me nor could I hear them when I picked up a call - A reboot/restart fixed it.
4. No need to download UPPERCUT (that is hard to download), because LGUP works fine without UPPERCUT.
I have 4 problems remaining -any help for solutions here is appreciated - especially exact type help please:
1) On LAF/Boot (original download) partition: Vol+ & connect to USB caused the download mode to come on for about 2 seconds and then TWRP (however I am glad that TWRP is here) -Prefer this to be the original download mode.
2) On Recovery patition: Vol- & connect to USB causes fastboot to come up. Flashed the recovery-twrp-h918-2018-10-18.img (renamed to recovery.img) to recovery partition using flashify and TWRP unsuccessfully. -Prefer this to be TWRP.
3) TWRP cannot access the Data partition. Rebuilt and reformatted Data from TWRP without success. -Prefer access to Data from TWRP.
4) At boot time: I like to get rid of the warning that my bootloader is unlocked. -I can live with this one.
After thoughts: Now that I am rooted on the latest stock Oreo H91820H -I am not sure what I want to load that I could not before?! overclocking the CPU or changing the hue on the display is not a big deal for me at all. & Yes I will uninstall some bloatware - but that is not so bad on this phone anyhow. Any good ideas or a better/later rom than H91820H that has all things working, do please let me know. I am glad that I rooted, ahh the challenge, but if I have no other reason such as to load a program then I think I will revert back to stock and unlock the bootloader & let the ROM updates come from T-Mobile & LG.
-Shahin
Click to expand...
Click to collapse
I had this same situation and ended up bricking the phone, can't get into recovery, stuck in boot loop. This was months ago, just got another v20 and ready to try again. Previously I'd successfully done 3 v20's.

Error in installing twrp

Hy everyone ineed help..
I have h990ds in nouget android security before 2016.
I try to root but in the middle of proses,its error, i try to flashing by lgup but the screen only flashboot mode. :crying::crying:
The some words in my screen:
Fastboot mode(red color)
Product name_msm8996 64gb
Varian_msm8996 64gb
Hw version_rev10
Bla...
Serial number -lgus996af7da36 (my type h990ds)
Secure boot-disable
Lock state_lock
[1090]
[1140]fastboot mode started
There 3 steps .bat after runfirsttime.bat
An i click step3 after step 2.

nuqudlover said:
Hy everyone ineed help..
I have h990ds in nouget android security before 2016.
I try to root but in the middle of proses,its error, i try to flashing by lgup but the screen only flashboot mode. :crying::crying:
The some words in my screen:
Fastboot mode(red color)
Product name_msm8996 64gb
Varian_msm8996 64gb
Hw version_rev10
Bla...
Serial number -lgus996af7da36 (my type h990ds)
Secure boot-disable
Lock state_lock
[1090]
[1140]fastboot mode started
There 3 steps .bat after runfirsttime.bat
An i click step3 after step 2.
Click to expand...
Click to collapse
The good news is that you've got the dirtysanta bootloader installed (that's why it's reporting us996) so you should be able to fix it without using LG UP and having to redo most of the process.
Install twrp by doing fastboot flash path/to/twrp.img .then pull the battery when done. Then enter twrp by using to volume key method (hold volume down, press power until the screen turns on, then tap power repeatedly until a menu asking to factory reset appears, say yes (while twrp is installed it won't actually wipe anything).)
Flash a rom (a stock one is here), and magisk.
If you can't use an sdcard to get them accessible to the phone in twrp, in twrp you can go into advanced then sideload and connect to a PC and do adb sideload path/to/rom-or-magisk.zip

Phoenix591 said:
The good news is that you've got the dirtysanta bootloader installed (that's why it's reporting us996) so you should be able to fix it without using LG UP and having to redo most of the process.
Install twrp by doing fastboot flash path/to/twrp.img .then pull the battery when done. Then enter twrp by using to volume key method (hold volume down, press power until the screen turns on, then tap power repeatedly until a menu asking to factory reset appears, say yes (while twrp is installed it won't actually wipe anything).)
Flash a rom (a stock one is here), and magisk.
If you can't use an sdcard to get them accessible to the phone in twrp, in twrp you can go into advanced then sideload and connect to a PC and do adb sideload path/to/rom-or-magisk.zip
Click to expand...
Click to collapse
After use adb fastboot flash recovery twrp.img, there's new problem.
Using volume key mode my screen is blank, just like broken TV.. :crying::crying:

nuqudlover said:
After use adb fastboot flash recovery twrp.img, there's new problem.
Using volume key mode my screen is blank, just like broken TV.. :crying::crying:
Click to expand...
Click to collapse
to totally back out and bring your phone to totally stock use download mode (from powered off hold volume UP while connecting to the pc). The screen will be still messed up but it will still work on the pc.
Use patched LG UP in partition dl mode to flash everything with a stock h990(ds) kdz.
Once you start using dirtysanta next time (if you decide to try again) be very very careful when using LG UP (easier to just use stock flashabile zip) unless you want to redo the above and flash EVERYTHING back to stock (if you ever flash the aboot partition in LG UP and anything ISN'T stock it will brick you! This mostly applies to partition dl mode since upgrade mode flashes everything, but partition dl mode is the only mode you can even potentially flash things and keep root (but I don't encourage this... its easier and saferto just use zips in TWRP to flash firmware (mostly stock basedrom or so called stock flashible zips tend to also flash all of the firmware except parts needed to keep root. )

Phoenix591 said:
to totally back out and bring your phone to totally stock use download mode (from powered off hold volume UP while connecting to the pc). The screen will be still messed up but it will still work on the pc.
Use patched LG UP in partition dl mode to flash everything with a stock h990(ds) kdz.
Once you start using dirtysanta next time (if you decide to try again) be very very careful when using LG UP (easier to just use stock flashabile zip) unless you want to redo the above and flash EVERYTHING back to stock (if you ever flash the aboot partition in LG UP and anything ISN'T stock it will brick you! This mostly applies to partition dl mode since upgrade mode flashes everything, but partition dl mode is the only mode you can even potentially flash things and keep root (but I don't encourage this... its easier and saferto just use zips in TWRP to flash firmware (mostly stock basedrom or so called stock flashible zips tend to also flash all of the firmware except parts needed to keep root. )
Click to expand...
Click to collapse
I already use lgup pacher, when connected the message unknown model
Can i using flash laf.bin from fastbootmode?

nuqudlover said:
I already use lgup pacher, when connected the message unknown model
Can i using flash laf.bin from fastbootmode?
Click to expand...
Click to collapse
But did you use partition dl mode? It alone bypasses the model checks.
Partition dl mode isn't in regular lg up, you need the special patched version I linked (replace the files of your regular lg up with the special version)

Phoenix591 said:
But did you use partition dl mode? It alone bypasses the model checks.
Partition dl mode isn't in regular lg up, you need the special patched version I linked (replace the files of your regular lg up with the special version)
Click to expand...
Click to collapse
I already put your special patched to my Lgup..

nuqudlover said:
I already put your special patched to my Lgup..
Click to expand...
Click to collapse
Try uppercut then. Use upgrade mode if it works but partition dl mode is missing. Note uppercut asks for lg up version 1.14 . I can't remember what version the patched one is but you may have to reinstall that version instead.

[GUIDE] How to root, install TWRP, ROMs and mods on a G3s/G3 beat d722 in 2020?

*After I wrote this whole thing as a DM i figured it might be helpful for a couple of people that are struggeling to root and install a custom recovery on their d722.*
Before we start you will need a PC with internet connection and a USB cable.
If you get stuck or need something about the device you can find it here. It's an XDA thread about the d722, it's mods, roms... : https://forum.xda-developers.com/lg-g3/general/lg-g3s-beat-d722-thread-t3110048
First you will need to flash your phone back to 4.4 kitkat firmware to ensure maximum compatibility (this is the only way my device would root) ( find it here: https://lg-firmwares.com/ (type in your model and download a 4.4 firmware closet to your region, language...)). We will do that with the lg flash tool (find it here: https://lgflash.com/download/) + also install lg drivers if you don't have them already (https://www.lg.com/us/support/help-library/lg-mobile-drivers-and-software-CT10000027-20150179827560).
1. First enable developer options in phone settings by tapping the build number 7 times. Go to the developer options and there tick usb debugging. Than you want to turn you device off. Hold volume up and plug it into you computer. You will get into download mode. On your PC extract and open the lg flash tool. There you will chose your kdz firmware file you downloaded previously and click normal fash. Choose other instead of korean and your preferred language. When you flash it the tool might report an error but just ignore it and wait for the phone to reach 100% download. It will reboot itself when finished. After that you can close the flash tool and continue to the next step.
2. Now you will root your phone. You will do that with lg one click root (found here: https://forum.xda-developers.com/lg-g3/general/guide-root-lg-firmwares-kitkat-lollipop-t3056951). Download the latest GUI version, install it onto your PC and open it. When your redy plug your phone into the computer (turned on no apps open) and click start. Wait for it to be done. It's normal for it to restart a few times.
3. Now we will instal the custom recovery to be able to flash ROMs. To do that you will need to dowbload this zip file from here and extract it with 7zip (https://forum.xda-developers.com/showpost.php?p=61220755&postcount=100) and install ADB (remeber install folder) (from here: https://forum.xda-developers.com/showthread.php?t=2588979). Paste aboot file into /sdcard folder (or folder of choice with adjusted path in command) ob your phone uding file manager. Than open CMD and type in
cd *path of your folder*
adb shell
su
dd if=/sdcard/aboot.bin of=/dev/block/platform/msm_sdcc.1/by-name/aboot
If you get an error that says there is no aboot file or something similar than you nees to change this command : dd if= *your phones path*/aboot.bin of=/dev/block/platform/msm_sdcc.1/by-name/aboot For me it was : dd if=/external_SD/aboot.bin of=/dev/block/platform/msm_sdcc.1/by-name/aboot
4. This should have installed a basic version of TWRP on your phone ane booted into twrp recovery but we will be updating it.
To get into recovery from off state hold volume down + power button until you see the LG logo. Relese both for a split second and hold both down again (volume down + power) until you see an option to factory reset (wont actualy reset anything if you did all steps correctly). Click yes and yes again by using volume and power buttons and you will be booted to TWRP.
Alternative is to go to playstore and download root app that boots you to recovery if you do it often.
This version is quite old and not capable of flashing newer ROMs so we will be flashing an updated version (download it here: https://vasy.ru/TWRP/jagnm/ and rename it to .img if it isnt named like that alredy). Easiest way is to download it to your PC and transfer it via USB if your PC detects the phone while in TWRP. If not boot it up transfer the files and boot back to recovery. Now just flash the .img file and reboot.
5. At this point you have root privilages (super SU) and a custom recovery. Now all theres left to do is to flash ROMs and mods.
You boot to TWRP recovery, connect your phone to the PC and transfer the .zip files you want to flash. Tha you click flash in twrp chose your ROM files and click add more, your GAPPS click add more and the mod (if you want to try it of course). Than you flash them, wair for it to finish and click reboot.
If it takes longer than 15 min+ than you probaboy have a bootloop. To fix it take out the battery put it back in and boot into recovery (volume down + power until LG logo pops up, release for half a second hold again, yes and yes). Try factory reseting (type yes). And than just flash the ROM and boot. If it boots go back to recovery and flash GAPPS and mod and it should normaly boot into android.
If nothing fixes your issue you can alway use the firmware and lgflashtool to go back to default unrooted kitkat or lolipop.
My recomendations:
I personaly use this liniage (14.1) 7.1 ROM as it's still getting updates (I also tried 8.1 but it's buggy, laggy and gapps don't work):
https://forum.xda-developers.com/lg-g3/development/cyanogenmod-14-1-lg-g3s-t3508224
And of course you want google apps to go along with it:
https://opengapps.org/ (pick ARM, android version of ROM (7.1 in this case) and how many preinstalled apps (I use nano))
I also have this mod installed which makes colours of your display a bit better:
http://www.mediafire.com/download/6z9yg1d3gooyz37/Sony_Bravia_3.zip
From here you can also get Exposed framework, root apps like LSpeed to speed up your phone even more, greenfy and amplify to improve battery life. Again every mod for this phone along with overclocking and other mods is or was discussed here at one point so dont be afraid to join the conversation in this thread:
https://forum.xda-developers.com/lg-g3/general/lg-g3s-beat-d722-thread-t3110048
And ofcourse google is your friend if you get into any issues. Hope this helps, typed it on my G3s .

Thanks
---------- Post added at 12:28 PM ---------- Previous post was at 11:44 AM ----------
It would be better for our phone to release an android 9 custom, it would be great. Here is the same phone as our processor and video accelerator. Android 9 would work great on our phone https://4pda.ru/forum/index.php?showtopic=633150&view=findpost&p=36961339

Thanks for the guide!
I bought a G3s D722 cheap off ebay to experiment with. I tried to flash four different kitkat roms many times on 2 computers and each time the phone went into boot loop (start tune and logo over and over) so I flashed the first UK Lollipop on the list and all went fine, there are not UK kitkat roms in the link.
The UK kitkat roms must be different is all I can determine anyone know where I can get one?
The preflash OS was V20e-EUR-XX and now its V20d
Any thoughts or suggestions anyone?
Thanks!

I couldn't get this to work so tried the very easy no PC method in the link and it works great!
LG G3/G3s/G3 Beat telekom,orange or any other operator
Hi everyone, I want to show u how to upgade your LG G3s/beat to adroid 7.1.1 lineage OS. It has taken me some time to find and to gather all needed files but i was succesfull :D So I had my lg running on android 5.1 Lollipop but I had problem...
forum.xda-developers.com

One Plus 8 Pro features (Wifi / Camera) stopped working after root

I rooted my OP8-Pro. I followed the instructions in this video:
https://www.youtube.com/watch?v=UVABAEGRgew.
To summarize, his steps were as follows:
1. Unlock the bootloader
2. Extract boot.img file from payload bin file (on Windows)
3. Install Magisk Canary 2020 app on the phone
4. Install the boot.img file through Magisk
5. Download Fastboot.zip in Windows and extract files
6. Download and place magisk.patched file in Fastboot folder
7. Connect the phone to Windows, use cmd to boot into bootloader
8. Flash the magisk.patched file on the device and reboot
This is a new method to me. In the past rooting always involved TWRP. Root checker shows that the phone is rooted but other features have stopped working.
WiFi no longer works. Even if I turn it on, it turns itself off. Camera keeps crashing and I can't even change the camera mode once I launch the app. My phone also rebooted itself a couple of times while I was testing it after root.
I also rooted my One Plus 6 in 2019 but had to use a custom TWRP (Bluspark) for it to be stable.
I rather start over with a factory reset than try to repair the device in it's current state (but will try to repair it if it's easier). I prefer to stick with the factory ROM and only need root for one app.

Try latest stable magisk instead of canary. Mine works perfectly with regular magisk

I used the all in one tool by mauronafrio here. Worked flawlessly.
shagexpert said:
I rooted my OP8-Pro. I followed the instructions in this video:
https://www.youtube.com/watch?v=UVABAEGRgew.
To summarize, his steps were as follows:
1. Unlock the bootloader
2. Extract boot.img file from payload bin file (on Windows)
3. Install Magisk Canary 2020 app on the phone
4. Install the boot.img file through Magisk
5. Download Fastboot.zip in Windows and extract files
6. Download and place magisk.patched file in Fastboot folder
7. Connect the phone to Windows, use cmd to boot into bootloader
8. Flash the magisk.patched file on the device and reboot
This is a new method to me. In the past rooting always involved TWRP. Root checker shows that the phone is rooted but other features have stopped working.
WiFi no longer works. Even if I turn it on, it turns itself off. Camera keeps crashing and I can't even change the camera mode once I launch the app. My phone also rebooted itself a couple of times while I was testing it after root.
I also rooted my One Plus 6 in 2019 but had to use a custom TWRP (Bluspark) for it to be stable.
I rather start over with a factory reset than try to repair the device in it's current state (but will try to repair it if it's easier). I prefer to stick with the factory ROM and only need root for one app.
Click to expand...
Click to collapse

I used the all in one tool by mauronafrio here. Worked flawlessly.
Click to expand...
Click to collapse
So I tried that tool. I tried to flash factory image downloaded directly from One Plus website and kept getting the following error message:
"Error: flash-all.exe or flash-all.bat or flash_all.bat or flashall.bat not found!!!"
I think this has to do with the fact that I am using a secondary hard drive on my computer to store all the downloaded files and the bat file is supposed to be in the same folder as the zip file.
I also reset it to factory settings from the recovery mode but that didn't fix the WiFi issue.
Then I ran TWRP from the All in one Tool and installed the factory firmware from phone's internal memory. This soft bricked my phone.
After getting soft-bricked I installed Magisk through the tool but that didn't fix the issue.
Now it is stuck in a boot loop and keeps going into recovery mode. I can also boot into Fastboot mode and install zips through there but I would like to unbrick it first. Is there an alternative ROM that can unbrick it?

I think I am going to try and use the unbrick tool first and if that doesn't work I will try the Fastboot ROM, that already comes with the bat file.
I am a little confused as to which version goes on my phone though. They have Indian, Global and European versions but I live in the U.S. Global seems to be the most appropriate for my phone but I don't want to install the wrong ROM on it.

I remember reading that you can run into WiFi issues if you flashed the wrong version (from a different region) for your phone
I've rooted for many years and this is the first time I didn't go through TWRP as well.

If you use the unbrick tool you'll probably get issues with the fingerprint reader. But that's fixable, after you've rooted.
The easiest way to get root is to just unlock the bootloader, fastboot boot twrp (not flash), and then flash magisk 20.4 stable.
Before TWRP you had to patch the boot.img and fastboot flash it, but with twrp there is no need for it.

If you use the unbrick tool you'll probably get issues with the fingerprint reader. But that's fixable, after you've rooted.
The easiest way to get root is to just unlock the bootloader, fastboot boot twrp (not flash), and then flash magisk 20.4 stable.
Before TWRP you had to patch the boot.img and fastboot flash it, but with twrp there is no need for it.]
Click to expand...
Click to collapse
Thanks for letting me know. I attempted to use the unbrick tool but it had problems connecting to the phone. And I also didn't want to run into finger print issues.
I downloaded the patched Rom (with flash-all.bat file included) and installed it via All in one tool. That unbricked the phone and I reset the system to start from scratch. I used the global / international version for my North American phone.
After setting up the phone, I rebooted into Fastboot and loaded TWRP via All in one tool and installed Magisk 20.4 and got the phone rooted.
Root checker shows the phone is now rooted. WiFi and camera also work. I am ready to transfer data from the old phone.
This would have gone smoother if I had just used the correct version of Magisk from the start.

Phone doesn't get recognised in Download mode (bootloader)

Hi Guys
So my current goal is to root my galaxy S10+ (SM-G975F) running exynos with android 11. I've seen many methods that are supposed to work for android 11, some more complicated than the others.
The method I chose to stick with, is to enter bootloader through adb using cmd on my computer and to flash twrp that way. (Bootloader is unlocked already)
After that I should be able to install magisk via twrp to complete the root access.
My inital thought was to flash twrp via odin, because odin did recognize my phone after entering bootloader. The problem was that after flashing twrp with odin and performing vol down + power then bixby + vol up + power which normally makes you enter twrp, I got stuck in a bootloop. After that I had to flash the stock ROM via Odin to "repair" my phone.
From what I've read this is due to the vbmeta protection mechanism, that you need to deactivate to avoid bootlooping.
So I heard that you can extract the boot.img file from the official firmware and edit the file with HxD Binary editor to replace a bitcode's value with a series of 0's. Unfortunately I couldn't find that specific code in boot.img.
So the remaining option was to manually flash vbmeta.img and to disable verity verification via cmd.
This is where the big problem lies, my PC does not recognize the device as soon as I enter Download mode. I tried every possible fix I could find online, they all revolve around installing certain drivers and applying them to the device in the device manager. Apparently the device needs to appear in the device manager under "other devices" with a yellow triangle then you can manually select a driver to install. Unfortunately as soon as I enter Download mode (Via cmd command or manually) my device totally disappears from the pc. Only Odin still recognises it somehow.
I installed official android device drivers, specific drivers for bootloader etc.
Every online guide about solving this problem needs you to locate the device and to apply certain drivers to it, but nothing appears for me.
I hope somebody can help me

Format data?

What your twrp version ? your twrp version must be version support 11.

You cant flash Magisk via TWRP. It doesn't work, Install the magisk App

Wrong place to ask this stuff