can you flash the edge+ 5.1.1

Hi

i am so confused right now

i have the edge+ T mobile SM-G928T running 5.1.1 i want to install another rom via Odin and get rid of all the logos and bloatware but everytime i try it fails apart from using the original tmobile firmware so without rooting is it possible to install another firmware ?

i enable usb debugging still same but when i use original firmware installs no prob