I want you to tell me what is the temperature on your phones .
I got mine for 5 days now ,made an factory reset with no backup and S10 is still warm. During charging is like 39 and in normal use is 33 ... I think it's too hot.
Can you tell me what is the temperature on your phones ?
40 C and above for extended times idle is a concern.
Gaming is a culprit for it to rise
Below is the safe zone.
EDIT//// CHARGING is the only exception where it mildly rises but falls and levels off.
One reported 60 C.
Thats insanely hot and never should go that high.
Other than charging and gaming, 36 to 45 is acceptable at times and then reducing later.
I am OCD about temps.
So any having above 45C and not reducing or nearing 50 is grounds for RMA or diagnostics with samsung.