Many users asked for an alternative to Shaking the iPhone when they want to go back. It was indeed quite difficult a move when you are driving your car.
From now on, you can use 2 additional voice commands for this purpose: when Vocalia is mistaken, you only have to say "try again" or "go back" to show the previous screen.

How does it work?
1. Say the contact's name.
2. The contact you asked is not in the result list.
3. Say "Try again" or "Go back" to go back automatically to the previous step.
4. Say the contact's name again.

Or

1. Say the contact's name.
2. Say the number before the contact you want to call.
3. Vocalia shows the information of another contact.
4. Say "Try again" or "Go back" to go back automatically to the result list.
5. Say the number before the contact again.

Remark
To use the new voice commands, you should have selected "Voice" as Navigation Mode in the settings.