Almost everyone suffers from the problem of overheating. However, expensive phones of the current generation do not have this problem as these phones are equipped with a liquid cooling system that protects the phone from getting hot. However, low-budget phones suffer from heating issues due to the lack of this system.
Oppo A77 4G phone has a powerful CPU that helps your phone perform well. The Oppo A77 4G phone has no heating issue. But the phone may be hot for some reason.
For example, since the phone supports fast charging system, it may heat up while charging. Also, there is a possibility that any phone will heat up after prolonged gaming. Also, there can be many other reasons due to our wrong usage.