Can i flash global S6 Edge Firmware on my AT&T's S6 Edge?

Hello,
I own a AT&T galaxy S6 edge(SM-G925A), but i don't like it's firmware. I would like to know if I can and how I can flash Global S6 Edge (SM-G925F) firmware.

I have android 5.1.1 and the build number LMY47X.G925AUCU3BOI2

Sorry for my English, I'm not American.

Thanks!!!!