If you have longer hair and are looking for a way to create a faux bob without cutting your length, then consider an updo that looks like a bob from the front.
This is a really cute style done worn by Becki Newton. She has a middle part and her bangs are long enough to hit at shoulder length so they are left down while the back is brought up into an updo. The sides are curled with a curling iron into informal spirals. She is blonde with highlights and lowlights that give lots of depth. The picture below shows an example of how the back could be styled. This bun has a weave appearance and adds something a bit special to an otherwise ordinary style.