Quote Originally Posted by VOIPoLucas View Post
I just messed around with this a little on an iPhone 4 and things went ok, but the voicemail command wasn't recognized. When you tried it on your other cell phone, voicemail was recognized?
Yes, my other cell caused the DND feature to go from "Disabled" to "Voicemail." That was with my Add-on line, not my primary line (my cell phone is registered to the Add-on line, while my wife's iPhone is registered to the primary lline).

Maybe I'll try some other commands with the iPhone -- possibly the DND to Voicemail command is broken?