Plot hole: Given the amount of destruction all over the world, it is HIGHLY unlikely the use of phones by general public would be possible, especially internationally. If any lines of communication were working, they would be completely jammed.

2012 (2009)
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Directed by: Roland Emmerich
Starring: Woody Harrelson, John Cusack, Danny Glover, Oliver Platt, Thandie Newton, Amanda Peet, Chiwetel Ejiofor
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President Thomas Wilson: Six months ago, I was made aware of a situation so devastating that, at first, I refused to believe it. However, through the concerted efforts of our brightest scientist, we have confirmed its validity. The world, as we know it, will soon come to an end.
Trivia: It's not an accident that Wisconsin was chosen as the new South Pole in the movie, its position being 44N/90W, 44 being a number that Roland Emmerich tries to sneak into every movie he makes since his 'Moon 44' days. (01:37:25)
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Chosen answer: Its a safety device so the ship doesn't put to sea and ends up flooding the ship. The passenger ferry Herald of Free Enterprise capsized in the port of Zebrugge in 1987, precisely because the doors were not shut properly.
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