This is a phenomenal movie, the writing, direction everything perfect.
I was screaming of terror, clapping for the storyline because there wasn't a single moment where I felt the story didn't made any sense.
People might think they should have slide down the pole, but they cannot because it was not a polished surface but old rusted metal under hot sun in middle of a dessert.
They could tie there phone on the drone and get it down enough for it to receive the signal.
But thr drone could not carry extra weight or might be necessary they want it a mobile phone on the remote to operate it properly. Or just they didn't think of it.
But what ever it was, this was the most incredible movie I have ever seen. It's better than Bird Box. It's better than Gravity, even though it did not have marvelous CGI of outer space.
The entire team of Fall deserves the credit for this, such a beautiful beautiful movie.