I am using S20 plus since 30/11/2020 before then I had iphone. when I started this phone it was warm already, immediately I called customer care and as per their instruction I reset all settings and update latest software. for few days it was running ok. but recently same problem occur and battery life is also decrease. Again I update to its latest version but this time I still have same heating issue. Specially when I record video for more than 30 seconds and phone gets stop and asked me to let it cool.
I regret that I switched from Iphone to Samsung.
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please visit this mentioned link to resolve your device heating issue: https://www.samsung.com/in/support/mobile-devices/why-the-device-heats-up-during-use/
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support