At last I am able to use DialCentral (just got the GV invite and created my account). Last night I used it for a few moments and called - was on Wifi. Today I am on a 3G connection thru my phone and am trying to use DialCentral. I dont see the Dial button being enabled at all, mt DialCentral number does not show and nothing seems to work. Is GV limited to Wifi use only and not 3G ?