I am thinking of buying a Blackberry 8320. I was wondering if anyone can tell me if the wi-fi feature on this phone allow me to use the wi-fi to make voice calls on my home wireless router and the wi-fi hot spots. I read that these phones 1st came out for t-mobile and that they could be used for both voice and data. At&t which is my current carrier now offers the 8320 but i am wondering if it can be used for voice calls on AT&T. Some one told me that if I buy the phone for use on AT&T I can only use it for data on WI-Fi. Just trying to learn more before I make my purchase.