So after you landed on the beach (part IV), enter the jungle (its to the left of where you land).
Now take the right path, you'll see a coffin with rope wrapped around it and you'll see 3 paths, take any of those 3 paths. When you have entered the next screen, simply turn around and try to go to the screen before with the coffin, which you wont, cause you'll keep ending up in other screens (this is just the fastest way so you dont need to walk to the end of the screen each time)
after 5 or so different screens, you'll see the tree with the big phone hanging on to it.