It is Sci-Fi thriller about three MIT students that are exposed by extra-terrestrial biological entity. During the running time I couldn't help thinking of District 9. It has a similar atmosphere somehow. You can't find any alien in The Signal though, two of them got parts of their body amputated then replaced by some kind of alien technology. watch them finally using alien power was quite impressive.
The last movie that I saw was Dead Set Serious. Its a British movie which has a zombie them and has a similar air to the movie 28 days later. In all honesty, its a great movie. The actors are great, the plot as well is pretty realistic and the story is not a traditional one which focuses on one or two characters.