This is a Phone amplifier. I made the size for iPhone se, 6s, 6s plus, 7, 8, 10. If your phone size is similar to these size you can just print and enjoy. If not you need to scale up or down for your phone.
The best way. Make a cube with your phone width and depth , than you can scale the amplifier model to this cube. And thats it.
Have a nice printing.