I still prefer the hard copy of the tickets. Working in IT, I have spent too much time dealing with phones, I prefer not to carry one. I am there for the game, that is my focus. The call will wait (especially in Ames on gameday). -- probably the one time I would like to have AT&T (they used to bring in additional trucks for coverage as well)
Last year it seemed that even when I downloaded my tickets, there was always a hook that was trying to sync back up. With the lack of coverage around the stadium, this would take forever. Screenshots were the way to go. Hoping this runs smoother this year.
Anything before gameday was a breeze (RV parking pass, ticket transfer, etc). Transferring tickets the day of (while tailgating) sucked. Screenshots and texting was the only way. I still do the wallet, just hoping for better luck this year.