Phobia 2 is (as is predecessor) divided into short segments, directed by an all star team of Thai movie makers. That is makers of movies of the scary kind! It's rather unfair to write a review of the movie as a whole, so instead I'll write a bit about the individual parts.
The movie starts out with "Novice", the story of a boy being dropped off at a Buddhist monastery. The segment is eerie and set in a beautiful environment. The horror theme is a mix between a few jumpscares and some painfully gory bits. All in all an OK segment, but it lacked in the scary department. 6/10
Segment number two, labeled "Ward" takes place in (surprise) a hospital ward. A young man is injured and confined to a hospital bed, next to a man on life support. He can't leave his room and bed as scary events unfold. That is also what the horror theme is based around, completed with a fair amount of well-directed jumpscares. 7/10
The third segment is named "Backpackers" and could be used as a propaganda film on why you shouldn't hitchhike. It has the feel of a classic horror movie, with great makeup, gore and sound effects. It also deals with morals in pressed situations as the protagonist has to make some tough decisions. It has been done before, but I still loved this segment. 8/10
The fourth segment, "Salvage" is set in a second hand car store, dealing in a very special type of cars. It's built around a lot of cool ideas and there's plenty of both gore and jumpscares, but the story is a bit weak in my opinion. 6/10
Finally, my favorite part. I loved the segment "In the middle" from the first movie and this one is even better. The cast from "In the middle" is back to poke more fun on the horror genre (including their previous adventure). The twists, turns, plot holes and clichés creates a truly hilarious and fantastic short. Banjong Pisanthanakun has a great deal of self distance and both Shutter (once again) and Alone are made fun of, as well as the entire Hollywood horror genre. 10/10