You can operate the nav and phone systems when you drive without voice commands, you just have limited functinoality. For example, when you press the phone button on the steering column, the phone screen comes up, then press speed dial, from there you can press any of the 3 pages of speed dial numbers. On the nav side, when you press the destination key and the destination screen comes up, there will be about 5 quick destinations along the bottom, just press one of those, of course you have to set them up in advance when you add or edit the destinations.