Gabriela Garcez

I don't usually like to give spoilers when reviewing a movie, but I feel compelled to clear up some misconceptions about the technology and the sci-fi genre as a whole that seem to be driving much of the criticism toward this film. And yeah, I hate to defend this movie, but here we go... [SPOILERS AHEAD] Anton apparently worked on developing parts of the wall tech at Epsilon Nanodefense, so he must've known it had a way to unlock it using a code. He figured out the code and developed the app to automate the code-flashing process. However, it could also be done manually, without the app, if someone could flash the correct sequence. This is confirmed in the scene when the light flickers in the secret Airbnb room and the wall glitches. It's also confirmed by the landlord’s attempt to trigger the wall with his camera flash (something he probably learned by watching the neighbors through his surveillance system), which caused the portal to open, ultimately leading to him losing his hands and possibly bleeding to death. Also, I’d like to point out that an app can run locally if all the necessary files are present on the device, even without a network connection. If Anton developed it, he would’ve had everything stored locally. And the movie clearly shows Tim’s character downloading those files onto his device. So I don’t think this is the huge plot hole people are making it out to be. It’s a fun, enjoyable sci-fi thriller. I agree that some of the background stories could’ve been more developed: the growing rift between the main couple before the wall incident, Yuri’s slow descent into conspiracy madness, and the whole backstory of Epsilon Nanodefense… Still, I genuinely don’t understand how people can watch a movie about a mysterious wall materializing around a building and then complain about its lack of real-world scientific accuracy. But hey, to each their own. I’d still recommend this movie.