Walter states that it's a myth that if you drill straight through the earth from Boston, you will reach China. Instead, you will reach India. The other side of the globe of Boston is open water near Southwest Australia.
When Olivia takes Jessica's phone back, the camera shows that the background of the iPhone's lock screen is Jessica's daughter. Before the camera zooms into the phone, there is the home page of the phone, not the lock screen. Also, the lock screen would normally have a panning highlight animation over the ''slide to unlock'' text. On this scene however, the highlight is frozen over the word unlock. Which reveals that the screen is actually a snapshot of a lock screen. Perhaps in order to delete the carrier name from the screen, which is also missing.