I've been contemplating this and have a sort of similar situation but not that similar. I want to flash my s4 but I updated it to the 4.3 update via Kies and obviously Knox has been installed. Now, my situation at hand is I have insurance through T-mobile to cover accidental damage and because of a drop the bottom left corner of the screen is cracked and over time I just started plucking the shards out and eventually just exposed the entire menu button side to the corner of the screen itself.
Now if I were to flash CF-Auto Root and then install CWM and CM11, will T-mobile still honor the Insurance?
Or if I were to Odin back to the stock mdl or mk2 rom, would they still take the phone back.