Dear Samsung member,
Greetings from Samsung Customer Support!
Be assured below given steps would help you out to solve the issue:-
1) Turn off Wi-Fi, GPS, Bluetooth etc and other connectivity features when not using them.
2) Decrease the screen brightness.
3) Close background running apps.
4) Uninstall the unnecessary apps,Long duration of graphics intensive gaming sessions.
After following the above steps if issue still persists, register your concern in Samsung members app Samsung member> get help> Error reports> Select Symptom category > describe problem in detail and Send.
Thank you for writing to Samsung.
Samsung Customer Support