text: Listening to music can help the driver focus better. It can also wake up a tired driver up by blasting some music. However, a GPS device cannot do that; with its monotone robotic voice, it would make the driver get even more bored. Another reason why a smartphone cannot be replaced by GPS device or why we should be able to use our cellphone is that, in the case of an emergency. Drivers can easily access a smartphone and call for help while if you had a GPS device, not so much.