Phone Stand
thingiverse
This will hold your phone perfectly, but to ensure it, I would make the stand thicker or thinner so your phone will slide in. Also I would advise to buy some adhesion pads so the stand won't fall over.
Download Model from thingiverse
With this file you will be able to print Phone Stand with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Phone Stand.