I don't use a case for my 3GS. I always keep it in my pocket (not the one with my keys). However, I bought my wife a rubber case for hers, since she keeps it in

I don't use a case for my 3GS. I always keep it in my pocket (not the one with my keys). However, I bought my wife a rubber case for hers, since she keeps it in her purse with her keys, lipstick, pens, pencils, etc.