MagSafe style mount for use with these magnets: https://www.amazon.com/gp/product/B09FZ5Z7S4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

The mount is adjustable via ball socket

If you plan to rotate your phone a lot, I would recommend the round mount

the space before the magnets is 0.2mm so I would recommend printing at 0.2mm with the first two layers at 0.1mm

You'll need to print both the front and back plate, the wall mount, as well as the nut and spacer (which goes in the nut after you've threaded it around the ball)