I'm on AT&T as well and I don't have a "Driving Mode" toggle in the notification bar either, in fact I can't find driving mode in settings anywhere. I can activate "Car Mode" through Tectiles, but I can't find a way to turn it on otherwise (maybe through S voice, but I'm not a huge fan of talking to my phone).
Anyway, what exactly does car mode do (besides activate S voice)? Does it read incoming text messages by default?
