
Continuity mistake: When Atlas walks in to the Octa phone launch disguised as a waiter he has a silver tray. Someone rearranges something on it as he walks down the corridor and it is plainly a silver tray. He walks through after the rearrangement and the next shot there is a briefcase visible under the tray. The tray is supposed to be a tray that becomes a briefcase but is too thin to do that. When first seen there is no space for the briefcase part to be closed up against the tray. (00:16:55)
Answer: Walter thought the chip was real because he placed it under a scanner and the scanner confirmed that the chip was real. However, given the fact that later on it was revealed that the whole plane sequence was a set up, it is probable that the device used to scan the chip was actually a fake that was used to make Walter believe the chip was real, most likely throw him off guard.
Casual Person