Meizu M2 Mobile Phone stand

This is my try at a stand for my Meizu M2 mobile phone. This is NOT the "NOTE" version which is bigger. Mine measures 140.1 x 68.9 x 8.7 so I made the slot just wider than this to accommodate it. It will not fit one with a case of any sort on.
Maybe I will redesign to have it do so in another version.
I have seen a lot of the phone stands with cones for boosting the speaker volume. I tried to add this feature in but to tell the truth I know very little about the shapes needed for the acousti