Factual error: When they were in the underground chamber and it was filling up with water. Nate is still talking to Sully through his phone app, despite his phone being in his pocket which would make the call so muffled as to be inaudible.
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Suggested correction: Nate was talking through the device in his ear, the issue with the phone is it breaking since it was submerged in water. The Bluetooth piece in Nate's ear is how he was communicating, not the Phone GPS App.
