the only thing keeping me out of an iPhone right now is that at my desk at my studio, where i spend 80 hours a week, i have bad/no reception with AT+T. i move 50 feet in any direction i am fine, but where i need it to work, it will not with any consistency. however i do have broadband and wifi. i am a total n00b to voip, so i am trying to understand this: once an app is created for the iphone that will do voip, will the voip fill in the gap and allow me to make and receive calls to the phone through my wifi? will it use the same phone number? if anyone can illuminate me on this it would be a great help. i am very badly trying to avoid getting a landline + an iphone if i can help it.