I bought 32g with wifi and 3G but so far (about 2wks) have not bought a data pkg to use the 3G. Can't bring myself to pay AT&T for lousy service, or no service as my iPhone never seems to get more than one or two bars anywhere . My goal is to see how long I can survive on wifi. So far, great.
Get the Mifi card from Verizon if you prefer them.