In my opinion nokia lumia 800 is a 3rd class phone. I was using nokia lumia 800 and seriously this phone is very bad. Internal memory was good 16 gb and ram 512 mb as well as camera is superb but sometimes phone was hanging while using application.
The worst thing is when I went to market place its a app store of nokia and believe me there is no other app like share it and any other app. I called nokia customer care and the executive told me that there is no update in nokia lumia 800 and nokia lumia 800 window version is 7.8. After that I broke up my lumia 800. Never use nokia phones