Samsung Galaxy S3 android phone is a great thing to play and use. it really understands you. With the driving mode option of Galaxy S-3, you can use the phone with your voice. I also had this question that what dose driving mode do? i found the answers like this on askmefast boards.
It sends the person calling you a text to say you are driving when they ring you as you can`t use the phone when your driving. I`ve got one and I think it`s a great feature.
“Driving mode allows you to interact with your phone using your voice only. Very useful when your hands are on the steering wheel.”
Install the third party app. The phone will read the incoming calls and text messages for you so you wont have to take your hands off the gear or steering to operate the fone.