I just got the T-Mobile SM-P607T a couple of days ago. It came pre-loaded with KK.
Android Version: 4.4.2
Baseband Version: P607TUVUANE2
If you search the Sammie site for compatible firmwares, it feeds back the following:
Model Country/Carrier Date Version PDA CSC Kies
SM-P607T USA (T-Mobile) 2014 May 4.4.2 P607TUVUANE2 P607TTMBANE2
SM-P607T USA (T-Mobile) 2014 May 4.4.2 P607TUVUANDA P607TTMBANDA
Nothing else. No older FW's for this device are reflected / found.
I was wondering if anyone might know what (if any) functional differences there are between the 607T and the 605.
Reason: I am considering trying to downgrade this Tab to Official Sammie Jellybean (in hopes of not tripping Knox) so that I can try to Root (again, attempting to preserve Knox 0x0). Would the P605 be a viable solution?
Once on JB, I would likely attempt the method I used to inject root during the 4.4.2 upgrade on my Note-3 which PRESERVED Knox 0x0.