Best method for
N970F/DS stock (never rooted) IMHO is to:
First backup all your user data if you don't want to lose it.
1) Unlock your bootloader, if not done yet. (follow the instructions from the first post in this thread).
2) Use latest ODIN to flash latest TWRP recovery from here:
https://twrp.me/samsung/samsunggalaxynote10.html
EDIT: You will also need to flash vbmeta.img, so maybe better just get TWRP from here:
https://www.mediafire.com/?uy9tuoajb0nkb#8sqrh1vj3x3li
Or get TWRP + avb disabled vbmeta from the official thread:
https://forum.xda-developers.com/t/...-x-twrp-for-galaxy-note-10-5g-exynos.4198413/
3) If you want to get rid of the boot screen warnings, flash this:
https://www.mediafire.com/folder/d4ugie4yadxu6/N975F#v8isi2szsu1ys
4) a) Boot into TWRP and install the multidisabler from here:
https://forum.xda-developers.com/t/...of-stock-recovery-proca-wsm-cass-etc.3919714/
b) If your internal sdcard (ie. phone data) is encrypted - you must do a wipe data/factory reset through TWRP wipe menu
5) To get root, I think the best way is to flash a kernel with magisk built-in. Either extract the boot.img from Dr.Ketan's N970F rom
https://www.mediafire.com/folder/d4ugie4yadxu6/N975F#uy9tuoajb0nkb, or if you got linux (Ubuntu/Fedora) and know how to, then build your own kernel (CruelKernel) from
https://github.com/CruelKernel/samsung-exynos9820 (use the
devel branch for Android 11 and follow all the build instructions).
To flash, the boot.img file, with this exact name, must be compressed into a .tar file, using a program such as 7-zip. Then flash the .tar file with ODIN.
6) To pass safetynet, install magisk safetyfix module. You may want to read this github thread and implement the keystore fix yourself for best compatibility:
I know Samsung is heavily skinned. Hope we can still get some help, and have sent a few beers if that helps. Enabling the fix breaks 3rd party apps from using fingerprint sensor. Two things I notic...
github.com
Specifically read this comment by nampud:
https://github.com/kdrag0n/safetynet-fix/issues/6#issuecomment-765906971
p.s. Phone must be in download mode when using ODIN.
NOTE: To enter TWRP (and/or any recovery) on Android 11, USB cable
must be attached to the phone and PC, then use the reboot key combo mentioned in the first post.