[Samsung Galaxy Tab S8] System23:
Also to ALL of You , One Thing you can See as Rule!!!! Before you Think you would Modify your Device with Different Options and you dream from that or that other thing you would or you can do, what inspire you more and more to do that!!!!! YOU MUST BEFORE YOU START, LEARN HOW TO FIX MY MODIFICATIONS BACK TO STOCK and there is it Necssessary to Download the Latest STOCK ROM example from SamFW/sammobile, thats your LifeGuard of your Device, when something goes wrong!!! Thats the reason why should be save on a PC/Laptop they you can Accsess!!! i Prefer for Windows the Programm Odin3 & 7zip!!! than the STOCK ROM comes in tar.md5 Package, and this can be Open with 7zip so you can Extract single Partitions!! To Test you can extract from AP_***_.md5.tar the boot.img.lz4,recovery.lz4,vbmeta.lz4 and Archive with 7zip these 3 Files to an TAR Archive calles "Fix_Modify.tar" that can in Odin3 select in AP can be Flashed so you FIX Patched Boot.img, Custom TWRP and modified vbmeta.img!!!!! have you run Multidisabler you must especally extract the vendor.img.lz4 and add to TAR fix-vendor.tar and Flash it via AP Slot!!! and this Time you Know it you can Fix it directly without Flashing Full STOCKROM in BL,AP,CP,CSC!!! and when you understand what would be modify than can you exakt extract the partition from STOCK ROM to FIX MODIFICATIONS!!!! Iam Think going Into Download Mode i must not Explain or ? Device must Connect with a PC via USB, and after Shutdown or befor Start Device you must Press VOL+ VOL- Power thats clear iam sure!!!

when everybody This One Simple Rule accept, than have we not so many Peoples they ask 4 Help wile the Device is not Booting,CustomRecovery not working,CustomRom not working,Bootloop,etc this is madly a True Situation that you can view in the Complete Developer Scene that peoples dont think before beginning Modification, make this Simple and Helpfully RescueCourse it better!!! when you would make your driver license you must make a Rescue Course, its the Same in green but here is your device the victim!!! And i Found its a MustHave an Knowledge

Odin is even availible on Linux, the Basics are the same

when you feel thats too much 4 you, than you should not Modify your device

UPDATE

Also my Expierience since over 20 Years has many Knowledge earnd and i take a look when everybody choose me, and do my best to Support them, and i can calm you in this Years i have only 13 Devices Destroyed von over Thousend of working, thats all with XDA!!! and the result is it is Safe to Modify the Devices you can only Destroy Partitions they you can Fix with this RescueCourse, However, there is an exception if it is IMEI manipulation, if these certificates are supported and you delete the NVRAM,NVDATA, you can no longer use SIM cards, and unfortunately an affordable procedure is necessary that costs around €70 to correct this error to repair!!! Do you have a Qualcom device since you have probably already encountered the EDL/Testpoint mode? This is an indestructible emergency mode that was developed for rescue purposes. This also costs a few euros because there are only a few known ways to work freely!!! and Since we no longer manipulate the bootloader ourselves and this safe is better, in the future we should only think about it with Qualcomm and stay away from IMEI manipulations!!! The rest of the modifications cannot destroy your device and can always be fixed in this way for Samsung devices, except for Samsung devices with MTK chipsets which are repaired differently, I have already presented them, but this is largely not applicable here except for With the exception of everything, everything can be repaired with simple means!!!