I currently am with Sprint & anxiously awaiting the end of my contract in the fall. I really want to consider the iPhone when my contract is up. However I have am having some reservations about the AT&T network in Arizona and in particular the Flagstaff area. I travel between Phoenix & Flagstaff a lot & don't want to put out a lot of $$ if the reception/coverage in Flagstaff is spotty. Can I hear back from AZ residents about their AT&T experience, please? When in Flagstaff I am in the downtown area and the area around Little America (South & East of downtown Flag). Thank you.