Here is a super passive holder for the HTC One. I bought it for my Sharan them on the dummy switches next to the radio and CD changer attaching. So I did not need to drill holes into the dashboard. The holder is attached nicely stable and can be the phone with one hand and out slide. I also have another fixture is attached to the ventilation nozzles, these must always be operated with two hands, which is ever annoying. The air vents from the Sharan are also too unstable for these fixtures, so I've made my decision for Brodit solution.
