Homage to the likes of The Evil Dead. Starts off with a group of students going to a secluded cabin and yeah there's no phone signal or something like that. 0 for originality. It's that basic setup again. One character is obsessed with old splatter movies which could be a nod to the inspirations of this movie, or more likely the result of a writer who can't create interesting characters. A socially awkward character also attempts to form a relationship with woman. This movie feels like it was written by a teenager. Nazi zombies? Because that makes them more evil or funny?
This movie is aware from the start of what it is and so are you. So you can't really moan at what you see as it's expected. In the end it turns into an average splatter movie with some humour. Original ideas would have been welcomed in the movie. Just one. Scenes were obvious copies like in The Evil Dead 2 when Ash removes his hand and weilds a chainsaw. The guy in this removes a hand and some arm and weilds a chainsaw, but maybe in a different order.
Unless you really love these tacky horrors don't bother. How it's rated so high is shocking.