I'm in SoCal. I have had only 4G sporadically since Sunday. I have havd no 3G access since then. If I lose 4G signal, which is frequently, I have nothing. I used to be able to use the CDMA only mode, but I can't now that I don't have 3G. I've done all the "tricks": i.e., airplane mode, restart, pull the battery, etc.