You should opt for a cell phone holder on the dashboard of your car for GPS navigation, because even holding your cell phone in your hand to navigate is prohibited in many places across the U.S.
The laws are becoming stricter as distracted driving becomes more commonplace. For instance, although Kentucky doesn’t have a ban on hand-held devices currently, it is moving to ban holding a phone, electronic gadget, or tablet even while navigating. It is a best driving practice to have everything factory-installed or hands-free within a holster on your dashboard and in your line of sight.