Many users are facing automatic restarts issues in galaxy M30s as soon as their warranty is expired, the service center tells to change motherboard which costs around half the price of phone. This is a software issue that I think samsung is deliberat...
Which game you play? I have m30s and I play cod approx 1 hr daily with almost 0 lag. If you are talking about pubg then that game demands more power and long sessions on m30s will lag