I have just for the first time, after some years owning various iterations of iPhones, just set the background (wallpaper) of my 4s as jet black. It looks AMAZING!!! The apps just pop and with the screen set to almost full brightness, I have fallen in love with my phone again. I recall how wonderful a piece of industrial design I thought my original 4 was, and I am now thinking it all over again with my 4s, and it excites me that in just a month or two, I will own a new one. And i will be sure to set the background to jet black. I am never changing wallpaper again! A black background looking so good may be old news, but it is exciting new news to me. Try it if you haven't already.