I have recently got my second replacement for my 16 gb iphone off o2 insure and the build quality is rather shocking! I have had it less than 48 hours and I instantly put it in a incase official iphone case off apple store and it has develop two small marks on the silver back of the phone. I know it sounds like not a big deal but after only 36hours I shouldn't have any marks on it should I? What should I do? I could phone o2 insure but they would just laugh me off as their first replacement had a faulty wifi (they are all brand new iphones as they were sealed when I got the replacements)