It's been driving me nuts. I got 2 iPhone 5s on AT&T Friday and my friend got one. We both live in San Francisco. Coming from iPhone 5, these new phone seem like they're constantly dropping from LtE down to 4g. We both live in San Francisco and the Bay Area and it seems to be doing it everywhere. The iPhone 5 latched into LtE and stayed there aside from when on a call. These new 5s seem to drop down to 4g randomly and then either stay there for far too long, or just get stuck on 4g until I go in and toggle airplane mode on then off then it goes back to LtE. Super annoying because I know it's not att as my friends next to me on iPhone 5 have LtE, and I know it's not a bad phone because all 3 I bought have the same issue. Seems like apple may need to do something software wise. It's driving me nuts.