AT&T recently rolled out LTE in the Denver and Boulder areas. However, when I enable LTE on my phone, and I am not within LTE range, I receive no connectivity whatsoever. When going from my work (LTE area), to my home (non LTE area), the network will not revert back to standard 4G. It still shows AT&T and a couple bars in the top menu, but I cannot place calls, browse web, send text messages, etc. Anyone else experience this issue? Not sure if this is something I should take to an AT&T store.