Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4553378.
There's a lot of phone stands already, but I wanted one that I could adjust the angle of display of my phone so I toyed with the idea of a simple ratchet like mechanism along with a hinge and it turned out really great!
This is entirely print in place. Once it completes printing, just gently break the ratchet off the edge of the back, then "break" the hinge and you're in business. This is my first time designing a print-in-place hinge and it really works well.
I printed mine in Galaxy Black with Silver Silk numerals on the ratchet. It looks really great, but unfortunately, photos of Galaxy Black are so hard to get right, so, I've supplied renders until I can get a good photo =).
The width of the phone tray in this particular version is selected to perfectly fit my phone, which is a iPhone X with a standard Apple case. Your phone may be different, so, I've also included a link to the shared design files (Fusion 360). There is a parameter "phone_thickness" that can be adjusted to fit your phone.
Link: https://a360.co/2CSG4wm
This particular version is for MMU2 owners, but, read on:
For single-color prints, simply load this project into PrusaSlicer (or whatever you use) and re-slice as a single-extruder/filament print. If you include the numerals component, there will not be any numerals on the side. If you remove the numerals component from the build plate in PrusaSlicer and reslice, the numerals will be printed as gaps in the first layer and are bridged on the 2nd layer which actually come out pretty well as recessed numerals.