I have a question about rounding edges (For cube). For Example, I have a simple cube. But, how do I round the edges like on the iPhone (For example):

I tried to do something like this, but this is the result: (picture #2)

How do I round the ends of my cube like this?: (picture #3)

I have a question about rounding the edges (of a cube). For example, I have a simple cube. What I don't get is how do I round the edges (like on an iPhone):

I tried to do something like this, but Picture 2 was the result.

How do I round the ends of my cube like in Picture 3? 

I have a question about rounding edges (For cube). For Example I have a simple cube. But, how to round edges like on model of iPhone (For example):

I tried to do something like this, but this is the result: (picture #2)

And my last question. How to round ends on my cube like this?: (picture #3)

Sorry for my strange english and for styling this post. I'm just can't to post more than 2 links.

I have a question about rounding edges (For cube). For Example, I have a simple cube. But, how do I round the edges like on the iPhone (For example):

I tried to do something like this, but this is the result: (picture #2)

How do I round the ends of my cube like this?: (picture #3)