[Samsung Galaxy Tab S6 Guides, News, & Discussion] xbt-:
I have a Tab S6 4G (T865) but this should also work for Tab S6 WIFI (T860) as well.

My tab is now rooted, there were some missing steps from various guides so I wasted time without a complete guide, so I'm writing a new one.

Thanks to @Sadistic_Loser for his guide and @Mentalmuso for his guide and TWRP work.

I. Get OEM Unlock to show up (If it doesn't show already. If it shows, skip to Part II.)

Check section I of my original Tab A7 Lite guide, it is the same.

[TUTORIAL] How To Unlock & Root Tab A7 Lite T220/T225, & Install LSPosed, Magisk, Mods

While some of these instructions are copied from other sources, I combined all the different things I learned, because no one guide was sufficient, and all needed additional info, so I expanded it all to one place. Part I is partly from...

xdaforums.com

II. Unlock bootloader

Enable developer options by going to Settings > About Tablet > Software information > and tap "build number" 7 times

Go to Developer options, turn on OEM Unlock (If it doesn't show up, skip to Part III and then come

Turn off your tablet, connect it to the computer while holding Volume Up and Volume Down keys until you see the bootloader screen

Long-press Volume Up key to enter Device Unlock mode

Press Volume Up key to confirm and unlock the bootloader

III. Install TWRP

There are ways without it, and I wrote a quick writeup how to patch Magisk manually in the following section, but why when there is an official and working TWRP? It's much easier so just do this:

You need a couple files first:

Download TWRP for your device (T865) (T860)

Download vbmeta_disabled.tar https://xdaforums.com/attachments/vbmeta_disabled-tar.6040705/

Now proceed:

Connect your tablet when on and make sure to authorize debugging.

Open Odin v3.14.1_3B_PatcheD (https://xdaforums.com/t/patched-odin-3-13-1.3762572/)

Reboot into bootloader. Turn off device, and hold VolUp + VolDown and plug in the USB cable which is already connected to your computer.

If you see PRENORMAL then you need to go back into your device and set the date back 10 days (internet is OFF!) by going to Settings > General > Date & Time > Uncheck auto, set date EXACTLY 10 days in the past. Now go into Developer options and check that you can see OEM unlock again. PRENROMAL will be gone and you can proceed.

PRENORMAL is the reason why you get the error that you can't flash anything because it needs to be official firmware. In fact you can do nothing at all until PRENORMAL is changed to CHECKING by doing above.

In Odin, click AP and select vbmeta_disabled.tar

In Options, uncheck Auto Reboot, and then flash by clicking Start

Reboot device back into download mode

In Odin, click AP and select twrp-3.7.0_9-0-gts6l.img.tar

In Options, uncheck Auto Reboot, and then flash by clicking Start

If it says success then you need to boot directly into TWRP. It's a bit tricky:

Hold Power+VolDown for 7 seconds until it turns black

Quickly switch to holding Power+VolUp until it restarts and keep holding

After the screen that says press power to continue, it should boot into TWRP

IV. Root

i. TWRP METHOD FOR ROOTING

You need a couple files to root:

The latest Magisk https://github.com/topjohnwu/Magisk

Multi Disabler https://xdaforums.com/attachments/vbmeta_disabled-tar.5371913/

Rename Magisk-26.4(26400).apk to Magisk-26.4(26400).zip

Now it can be flashed in Magisk.

Copy the files to a micro sd (will be a lot harder without it) and insert the microsd into your tablet.

In TWRP

swipe to allow modifications

go to Mount and select the SD card

and choose storage as SD card

Go to home page in TWRP,

click Install

find the file multidisabler-samsung-3.1.zip

and flash (install)

Clear cache and dalvik cache

Go to home page in TWRP,

click Install

find the file Magisk-26.4(26400).zip

and flash (install)

Clear cache, dalvik cache, AND data (it's in TWRP Home> Wipe > Advanced)

You are now rooted! Reboot

Setup, no need to connect to anything (in fact don't connect to wifi because you don't want anything updating before you do your preferred root stuff)

Now install Magisk-26.4(26400).apk normally.

Open Magisk and it will ask you to reboot to finish setting so agree and allow system to reboot.

Success! You are now rooted and have TWRP.

ii. ROOT WITHOUT TWRP (OPTIONAL)

I don't recommend this because it's unnecessary with TWRP, but If you don't do the TWRP method you can:

get your firmware from SamFirms here (or elsewhere if you have T860),

extract boot.img.lz4 from the AP_ file inside your firmware zip

copy boot.img.lz4 to your tablet or any android device

get zarchiver app to extract boot.img from boot.img.lz4

copy boot.img back to your tablet if you did it on another android device

install magisk apk and open it, go to Install and choose the boot.img file and proceed

copy the magisk_patched.img file back to your computer

open Odin

boot your tablet into download mode

choose the magisk_patched.img file

click the AP button and flash the file

if it worked then you should be rooted

skip to step 9 below

but you don't need to do this if you use the TWRP method.

If this helped you please remember to LIKE to show your support!