Filed under: iPhoneIt's looking like another iPhone prototype spontaneously vanished from Cupertino's campus, but this one seems like it may have made it all the way out to Vietnam. A Vietnamese forum has posted several pictures of the next-gen iPhone similar in most details to the prototype that Gizmodo bought. According to MacRumors, a Vietnamese businessman bought the prototype iPhone along with an iPad. It's going to be very interesting to find out th