This has possibly been the most frustrating thing I have ever had to deal with for any electronic I have ever had. I sync my phone with doubletwist and have even tried just simply dragging and dropping to the music folder on the phone. But when I go to play my music only some songs will play. I copied them all from iTunes but I get the error message: "Unable to play this type of audio file" I am 100% sure that it is an mp3 but for whatever reason it wont play. What should I do?