I prefer to surf the net and chat on the phone at the same time it's a wonderful feature. I hate it when i'm on video chat i get kicked off every time some on calls me ( sprint should of enable simultaneous voice and data a long time ago). I have to end the voice call then wait from my phone data connection to come back than i have to call the person.
I do love simultaneous voice and data over Wimax but it's to bad i don't have very good wimax connection in certain parts of the city