Default [Q] ROGERS, BELL, TELUS GN3 can be rooted on kk

Maybe this is the dumbest question ever asked on XDA, but, as I'm noob in this kind of discussions, there I go. Is there any way's that we can Odin flash ROGERS, BELL, TELUS kk firmware on our GN3? As I remember (Don't have to be the same for GN3) the At&t Galaxy S3 uses a firmware that was some like these other carriers from Canada. So is there a possible way that we can flash this firmware and work with the At&t antennas? Here is the link where ROGERS, BELL, TELUS can be rooted.

PD: Sorry about my English as I'm a spanish speaker.