Now Driving Mode in GDR3 is definitely a completely underrated feature, and has a lot of potential in terms of functionality. What I'm wondering though, is why you can't operate and toggle it manually without a Bluetooth device having to be connected. This would expand the experience allowing people to use it similarly to iOS 'Do Not Disturb' feature, but with more functionality such as the auto-reply feature. Has anyone found a way to activate it without using Bluetooth? Would it be a good idea to have a manual switch?