Made a stand for my iphone xr... with openings for mic and speaker.
It`s also hole for the charge cabel..

The horn from this page fits this holder
https://www.thingiverse.com/thing:1112960

I printet the horn in vase mode with 0.6mm nozzle and 0.2 layerhight....save time and fillament...

23.01.2020 update model charge plugg hole + minor fixes