We recently tried out the CacheAlaska Air Vent Holder for Danny's iPhone 6+ in his new work van. Here is now it came.
It was a little tricky to just find the right method to keep everything from falling out. With his phone being a iPhone 6+ it is giant and pretty heavy. He said he has to remove the whole piece to get the phone off of it every time he needs it. It works pretty good and will stay in there if he gets it just in the right spot. It is a great item to have on the go and easy to have your phone at arms reach but not in your hands.