said by NiteSn0w:The LTE chip doesn't control it. The phone has to have enough antennas for both LTE and CDMA to transmit and receive at the same time.
SVDO requires two CDMA radios, one for Data and one for Voice, each of which require their own antennas AFAIK.
Verizon isn't doing SVDO. Verizon abandoned developing phones on CDMA that will do SVDO. Instead they have worked with providers like Samsung to make LTE chips that work with CDMA for voice while the data is coming in on the other side of the coin. The only 4G phone that can do SVDO right now is the HTC thunderbolt, every other 4G phone that can do voice and data at the same time use a specialized LTE chip that enables that functionality. How do I know this because I work in the wireless industry and my company provides the crap to make it work. 
