Solidify modifier issue for increasing thickness I am creating 3D model of iPhone Case.

I have created it. But now I want to increase thickness of it. I tried using solidify modifier. But it is not giving result as I want.

See below is the image with no thickness.


After using solidify modifier it is not applying properly on camera cut.


Please anyone tell me to how to do this.
Few things you can check:


Your topology of the case: make sure it has less or no triangles and has a smooth flow.
Try adding an edge split modifier.
Ctrl+N to reapply the normals of the faces.