This is a remix of the phone stand from apalexander on Thingiverse...
https://www.thingiverse.com/thing:3065943
I wanted one that I could put my OnePlus 6 in while it was in it's OP case. I also wanted to adapt to fit it in my cup holder. This should work for most modern phones, as it will fit a fairly large phone, but also securely hold a smaller one.
The .gcode I uploaded has supports (I used enforcers to keep it somewhat minimal) but I'm not sure yet if they are even needed. I will report back once I print if it even needs the supports. The original file claims no, but this was a more recent model and it looks to me like it would need them.
print at .2mm with ~20% infill. I would suggest PETG or similar due to the fact that it is going to be living in a hot car. Supports aren;t supposed to be needed, but are included in my .gcode for a small part of the model.
The author hasn't provided the model origin yet.