You hit it right. According to this article: http://reviews.cnet.com/8301-13970_7-10453550-78.html Verizon is having trouble getting voice to work over LTE in their test markets, so they are going to go data only on LTE initially and use CDMA for voice. When I read that, I wondered if the voice problem was a function of something basic in LTE (like latency) or if the voice gear just doesn't play well with LTE yet. If it's the latter, then Skype VoIP applications would help offload voice traffic from CDMA for "power users".