I use this one: https://www.amazon.com/Magnetic-InfiniApps-Mount-Car-Smartphones/dp/B00DPMNNUO
It fits into the CD slot which I never use. It comes with a metal plate, which I've put inside the phone behind the back cover. This is what holds the phone magnetically to the mount.
I have a short USB cable leading from the charger port to the phone.
I am very happy with it. It holds my phone really securely and doesn't block the screen at all in landscape orientation. It does block it a little in portrait orientation but I don't mind too much.
Overall for $20 I'm very happy, and it's lasted several years.
I use the infiniapps magnet cd mount and love it. Go with either one. Especially if you don't use a case you can slip the metal piece under the battery cover
http://www.amazon.com/InfiniApps-Smartphones-Cradle-less-Quick-snap-technology/dp/B00DPMNNUO