I'm having the same issue. My phone keeps dropping from 3G to "O". It is really odd, I feel like it is causing my battery to drain fairly quickly as well. From 8am to 12p, I will likely see a 25% drop in battery. Email set to pull every hour, no programs running and no calls.
I'm thinking I should probably send this phone back and get a replacement. Anyone else having these issues? 🙄