Factual error: When flying from Korea to Israel, a nuclear explosion happens in the distance, the plane is hit by a shockwave, and then the phones go dead. The EMP from the nuke would have taken out all electronics first, not last. And they certainly wouldn't work again, especially a sat phone designed to receive radio waves. It would have probably also taken down the plane.
lionhead
7th Jan 2022
World War Z (2013)
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Suggested correction: There's no evidence this was a nuclear explosion. The mushroom cloud effect is most commonly associated with a nuclear explosion, but any sufficiently energetic detonation or deflagration will produce the same effect.
Except in this case, the explosion shown is a copy of a real nuclear detonation (Operation Crossroads, underwater), so it's obviously meant to be a nuclear explosion.