I tested many phone holders for my Toyota RAV4, and finally decided to make a custom one. Magnetic car mounts are not compatible with wireless chargers (because of the metal plate you need to fix to the phone). The rest are bulky and hard to mount/dismount or bulky.

There are two items, a top piece and a bottom piece. You need a couple of such top-bottom pairs to hold a phone. 

Two machine screws 8-32 https://www.lowes.com/pd/Hillman-8-32-x-1-in-Phillips-Slotted-Combination-Drive-Machine-Screws-100-Count/3037603

I tested it with my Creality LD-002R (resin) and with my XYZ Da Vinci (PLA).

Resin items need polishing. Sandpaper (350, 1500, 2000) - it takes 5-10 minutes to polish each item. Buy some wax polish to make it clean and shiny.

The resin print was ready to use. The PLA print in my case required some quick post-processing with a drill. Probably, this is because my printer didn't make it right.