Hi guys, I am a new iPhone users and waiting for the unlocked iPhone 4S on November. I have 4 questions about this smart phone: #1: I don't know that can iPhone 4 run many office formats such as: *.doc ( Word ) ; *.xls ( Excel ) ; *.ppt ( Power Point ) ; *.pdf ( Adobe Reader ) ; *.chm ( Ebook ) or not? #2: Another question is can it play media files like *.flv ( without open Safari ) ; *.mkv or not? I have many movies in my computer which I don't want to bring it to somewhere. #3: Does an iPhone 4 store data like an USB ( Flash driver )? If not, what do I need to do? #4: Being a smart phone, does an iPhone4 play Radio? or I need to download apps? Thanks for reading and replaying!