When you get encountered by a hacker in PUBG mobile, you have to be careful and consider a few things. First of all that the hacker cannot be killed in the open or when faced ahead. Trees and small objects are of no use to hide from him because his bullets can drift and change direction. The best decision to do is to go to a house, crouch in there, and wait for him when he gets inside you have to attack him along with your squad. Anyway getting insight into a hacker more often means you are pretty dead.