Vietnam internet is the worst thing that makes everything can possibly happen. In vietnam we have Viettel, MobiFone, Vinaphone, etc.. But all of them died after 18:00. When you meet vietnamese gamer, you can expect them saying "dit me (their wifi name)" when you play with them due to the
bad connection. Admin of games
will suspect a vietnamese gamer if they are lag switching or not, getting banned from the game is expected.