How do I remove dark areas from my mesh? I am doing this tutorial to model an iPhone. One of the things I try to work on is my ability to judge wether a mesh is ok or not ok. Now I think that these parts are not ok





So ... is there something wrong or not ? I already tried moving vertices but could not make these "dark areas" go. 

Also ... at about 10:30 min of the tutorial the "tutor" feels the edge of the iphone should be more "rounded" and repairs that. I thought my edge is ok ?
I think some of your vertices got moved arround, maybe by using "proportional editing/scaling".



Cleaned up version:



Work around: