We need to be connected to the rest of the world all the time, but using a cell phone while in your car can be dangerous. Using a good cell phone holder will make using one much safer. So many accidents have occurred in recent years that a lot of states have banned the use of cell phones while driving all together. But if you need to use the GPS function on your cell phone safely, the best cell phone holders can mount to your car's windshield. You're phone will be easily visible, and your hands will be free to drive.