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.
Other mistake: Despite the number of staff and zombies (former staff) at the W.H.O Research Centre, the car park leading up to the main entrance is empty but for one car.
Other mistake: When Brad Pitt is on the plane - I think he's landing in Israel - he doesn't take his seat belt off, but that doesn't stop him from getting out of his seat.
Continuity mistake: Three times through the movie, we see the command centre on the ship with people running around. Based on several people's movements, it seems that all these scenes were taken at one time, from different angles - too many of the same people moving the same way, carrying the same things.
Deliberate mistake: After the AN-12 launches from the carrier, you see U.S. Navy near the nose of the craft, and MG on the tail code (MG=McGuire Air Force Base). Also, during the flight shots, the plane transforms between a C-130 and AN-12 multiple times.
Factual error: When we are at the Welsh WHO facility we get an exterior shot during the night where we hear crickets chirping. This is a classic US film-making error. There are no crickets in Wales or any part of the UK. What you would hear at night is silence. Maybe owls.
Suggested correction: What on earth makes you think there are no crickets in the UK? The most common type found in the UK is the field cricket (Gryllus campestris). In total there are over 25 types of crickets in the UK. Ture that some species are mute, but not the field cricket.https://en.wikipedia.org/wiki/Gryllus_campestris.
Crickets in Wales don't make a noise as they do in warmer climates.
Continuity mistake: When Brad Pitt is changing the dressing for the female Israeli soldier on the Belarus plane, the man in the seat next to her appears, disappears and re-appears.
Revealing mistake: When Gerry cuts the woman's hand off you can see it's an obvious fake arm and stump.
Other mistake: When Jerry is in B wing, he has killed two zombies with his crowbar, but when we see the crowbar, there's no blood or brain matter on it.