I live in Boynton Beach, and have seen Band 12 only a very few times. I'm pretty sure it will only use it as a last ditch effort before having to drop to 4G, as it may have a stronger signal than band 4, it's also slower.Thanks for the input guys. I am in South Florida so I know Band 12 is here. I am currently on ATT though and thinking about making the switch, but just hesitant because of poor network stories I have heard.