this isnt possible with any phone ever on verizon that im aware of.. having cdma limits this.. u would have to be on at&t to access this feature.
even the verizon iphone wont do it. its just because cdma limits it.. I believe even 4G LTE wont allow this.. its still cdma phone service.
I am not an expert on this subject.. but these are my understandings.
-murph
Phone Performance and Battery Life
Hey, remember all those AT&T ads where they complained you can't talk and surf at the same time on Verizon? No longer. The Thunderbolt allows simultaneous talking and Internet access on both 3G and 4G networks. I tried it, and it worked well.
http://www.pcmag.com/article2/0,2817,2382155,00.asp