How to make a white iphone 4s look like a guy phone?

I got my moms old iphone and its white i just want to know how to make it look more masculine

But a case on it?

Get a black case for it

Get a car/gun wallpaper = instant man

Getting a better case first off, maybe a color to your expectations. White isn't girly nor manly. But you can get a colored screen shield.