I tried this out on a whim the other day just to see what would happen. I haven't seen this mentioned here (though I didn't do a search), nor did I find it in the manual. I hit the voice dial button on the steering wheel and said "Redial". The last number I connected to (it was an inbound call) was automatically redialed. No other voice commands were necessary. I've also now tried it with an outbound call being the last connection -- as expected, whichever the last connection was gets the automatic redial. I thought y'all might want to know.