Huawei Ascend P6 Phone case (3DS max) - need some help (no replies)

Hello there,

At the moment I am trying to make a smartphone case for the Huawei Ascent P6. My thought process on this was:

-Make a sketch (drawing the outlines of the phome) , scan it and then open it as a background in 3DS max
-Make a chamfer box for the rounded edges
-Copy the box, bevel the sides, make a hole in it via compound objects so the phone fits in
-Imprint the design onto the box with compound objects

My question is, is there any way to match the rounded edges perfectly? Via the chamfer box I can make rounded edges but these are not the same as the rounded edges my phone has. A picture for reference:



Also is the way how I want to approach it the right way, or are there any other practical ways that are much easier to do/with better results?

Thanks beforehand