"And the otterbox, appears to be a case that atrix fits in with a cover on the front as well as the back That stays on it and front cover opens?"
The Otterbox has several layers of protection...a hard, rubberized poly back, a protective "shield" on the front that protects the glass, and a rubber "shock-absorber" that hold thos two pieces in place. All this is put over the phone and stays in place. The last line of defense is the hard, poly carrying case that the whole thing fits into. It is very good at keeping phones protected. It also has an excellent warranty.