Attempting to upgrade rooted Galaxy Tab S4 (Android 8.1)


Feb 21, 2012
I currently have a Galaxy Tab S4 (SM-T830 USA-WIFI variant) that was rooted two years ago by me while it was on Android 8.1 and i believe build T830XXU1ARGH. I also had TWRP 2.8.4 installed at the time. I was looking first to upgrade to Android 10 with root and attempted to upgrade TWRP to 3.3.1 (which in hindsight was probably a bad idea since its for Android 10 not 8.1).

Now my tablet will not boot into recovery mode. I can get it into download mode but when using Smart Switch it hangs at 0% in the Emergency Recovery firmware.

When using Odin, I downloaded both SAMSUNG GALAXY TAB S4 SM-T830 XAR CELLULAR SOUTH T830XXU1ARGH FIRMWARE and GALAXY TAB S4 SM-T830 XAR CELLULAR SOUTH T830XXU4CTL2 FIRMWARE from SamMobile but when attempting to flash all I get are 0 succeeded.

At this time I am unable to boot into the OS and am stuck at the Download mode screen. Even after letting the battery go out fully, it keeps booting back here after charging.

Did I mess this up or is there still a way back for this?