I have Nextel 7520. When I am browsing or emailing and I get a call, the call comes in and prompts to "Answer". Mine does not go voice mail b/c of being in data mode. I have had calls go directly to VM at times, and it is aggravating, especially when you are waiting for someone to call you back ... your stareing at your phone, and you get a voice mail message instead of the call. When in data mode, I don't think someone can DC to me. I have been in data mode, and someone try to use the DC to me, and they said that their Nextel phone said "user in data mode".