When the girls are climbing the exterior ladder at the top, Hunter's oak leaves circlet tattoo moves positions, from her front left thigh where it normally is located, to the back of her right leg, for only one scene.
At 1:02:06 Hunter is shown wearing both shoes as she climbs down the short ladder in the wide shot. She only has one at this point in time.
After Becky charges the drone she leaves the red cover off the light, but it's back in place in several scenes after.
Hunter's hairstyle changes from French braids to a topknot mid scene.
When Hunter and Becky are driving to the tower, Hunter (driving her Ford Bronco) has the steering wheel upside-down while appearing to be driving straight forward. This can be seen in multiple scenes while she's driving.
The safety light on top of the antenna would consist of at least two bulbs so that if one blows the other takes over automatically. Or else someone had to climb to the top each time the bulb blew. There would also be steps or ladder to the top to secure the climber. Not just a 30 feet high pole.
Buzzards don't attack the living. They lack the physical attributes to pose a threat. They prefer to feed on animals that are already dead.
Becky's iPhone's battery could not possibly have lasted for as long as it did in reality. With no signal and repeated attempts at connecting and looking at the screen the battery would have gone dead in hours. It would not have lasted for days.
With being that high off the ground, with no structures (i.e. buildings or mountains) blocking your path, your cell phone would have a clear signal.
Ladders even to much shorter structures are protected by round cages to stop the operator from falling for a gust of wind, a broken rung, etc.
The tower in the movie not only lacks that, it is also totally accessible from ground level, with no gates, fencing, anything.
No feed-lines (hardline coaxial cables) going to the antennae. No power lines going to the tower. No transmitter shack near the base of the tower. No anti-collision lights. Only a single set of guy wires sort of visible. No base structure at bottom of tower.
However, the tower was being decommissioned prior to being dismantled, so many expected items may have been already taken away.
At one point, Becky takes the ring off her finger and attaches it to her necklace. One can already see a ring around her neck in previous scenes. However, this is presumably her husband's.
The thin structure and height of the antenna would make it extremely wobbly and unstable, especially at the top. It would be impossible for it to remain standing. The slightest imbalance or even a small gust of wind would make it tilt and collapse under its own weight.
While that would be true this considered to be part of the reasonable suspension of belief, as the apparent danger of the tower the way that it is would heighten the tension and suspense of the movie.
IPhone battery indicator shows fully charged when the main character uses her phone for the last time.
The class of drones which are fed with Wi-Fi signal from a regular phone have a range of about 100m before the signal is lost. Even If we double that distance due to clear Wi-Fi spectrum, the height, etc., the distance the drone traveled in the movie is far greater than a phone Wi-Fi antenna can emit.
The one guy anchor and wire shown is too close to the tower to have any support effect.
When Hunter falls, if you listen carefully, you can hear a loud noise, it's her body thumping on the dish.
At around 1:05:50 you can see part of a ladder under the dishes; the ladder disappears and reappears in subsequent shots (and the number of rungs varies).
In one of the shots (around 01:06:30) where Hunter lowers herself on a rope which turns out to be too short, you can see a second rope tied to it.
When looking through the binoculars, the viewing angle would be much steeper off the ground than what's shown in most of those shots.
Becky was married to Dan who had the last name Connor. Her father James also had the last name Connor. Though it is possible Dan and James shared a last name with no relation, it is not common and thus James would realistically have a different last name.
When discussing watching wrestling with her father, Becky says that they watched WWE. However when names the wrestlers they watched she proceeds to name wrestlers who are mostly associated with WWF. While WWF did become WWE in 2002, most of the wrestlers named are more associated with the earlier version and a fan would be unlikely to refer to them as WWE wrestlers.