I have Sprint Voice Command at a cost of $5.00 per month (well worth it). I entered access to Voice Command on the number 1 speed dial. Now, all I do is press the telephone switch on the steering wheel and the speed dial appears on the nav system. I touch Speed Dial #1 and hear a "bong" tone from Sprint. That gains me access to over 400 numbers on Sprint voice Command that are all accessed by voice. For example, "Call Bill at home." or "Call Bill on the cell phone" and it dials the number.
New names and numbers are added or changed over the internet from home, office or laptop. When I changed from my BMW to my Lexus IS 250 AWD, I didn't have to do anything but program the #1 speed dial number. Sure beats having to enter all of these numbers into the car. And, when I take my cellphone out of my car, I still have access to Voice Command dialing. I swear by it. Also, when I purchased a new cellphone, Voice Command was there ready to use.
Great convenience.
I have NO interest in Sprint - no stock and no employment there. Just really like the Voice Command feature.