Not liking the feel on lightweight stands with a heavy phone, I decided to design one that allows adding weights during the print.
Print the stand on its side with 0% infill. Feel free to scale in the Z direction for wider or narrower phones. Add a pause just before the top layers begin. During the pause add some sort of ballast. I avoided sand as I didn't want to chance spilling even a small amount. Resume the print, and enjoy.
If bridging the top isn't working well, try increasing the number of top layers.
The author marked this model as their own original creation.