Samsung Galaxy S5 Duos overheating problem!

[Maq Attaq]

Hi,
I am facing with an overheating problem on my Samsung Galaxy S5 Duos!
The phone was playing music for hours and hours without problem,also I was surfing the internet without problem,but it started to overheat a few days ago,even if I was surfing the internet nothing more!
It was on CM 12.1,so I decided to flash a new custom ROM (to update it to the Android 6.0),the Mokee.But the situation is almost the same!
So how can I test the phone to see what is the cause to the overheating problem?
And the Mokee ROM,has a big bug,when I try to make or receive a call,the phone restarts!
Please help me to solve these two problems,especially the overheating!
When I don't do anything on the phone,the temperature is normal,it overheats only if I do something,for example web surfing,but it still doesn't overheat if it plays music!
Thanks in advance!
Best regards!

 

[ironass]

There seems to be a number of issues with the Mokee ROM concerning the use of the dual sim feature and may explain the problems you are having. I would either wait for fix or change ROMs.

 

[Maq Attaq]

Dear ironass,thank you for replying to me!
But how can I solve the overheating problem?It persists on all ROM's!
Please tell me!
Thanks in advance!

 

[ironass]

Dear ironass,thank you for replying to me!
But how can I solve the overheating problem?It persists on all ROM's!
Please tell me!
Thanks in advance!

Try running your phone in Safe Mode for about 6 hours and see if it still overheats.

 

[combat82]

Try Cooler Master app....closes down apps and prevents them from reopening unless you actually open them....worked for me when my battery got hot.