So, in the Buttons assignment screen, it indicates that there is one button, which neither I nor the folks over at PocketPCReviews.net
However, "jhd" over at the ATT Wireless Customer Forums
figured out that the button on the single earbud/microphone set is that one button and how to use it for Voice Command:
1. a quick push takes you to the dialer and another one dials your last number
2. a longer push initiates voice command
3. a push and hold for a little bit does step one all in 1 motion...places the last number called, then another push allows you to hang up the call.
- woo-hoo! I am so used to having Voice Command on my XDA that it wasn't funny not to be able to use it on the PPC4100!