I designed this phone holder to be easy to use, easy to print, and compatible with a variety of vehicles. Only two knobs needed for quick adjustments. Tension clip holds phone in portrait mode, and can accommodate large phones with cases. I've been printing my prototypes in PLA, but recommend printing PETG for warmer climates.
The large clip slides on the long rod's clip. Short screw attaches the hanger and holder together. Long screw is for adapting to variety of rear-view mirror rod widths.