By the way, It started to overheat when I switched from offline mode to network mode. And I had already installed "theme changer"," N9QT 9.5.9" and OPPtimizer during offline mode 5 months back. Nothing strange happened in the past 5 months with this 3 application installed. I hope someone could help me.

I have a feeling that I damaged some chips on my N9 because of OPPtimizer when I switched it to mobile network from offline mode .

I hope there is still a chance on my n9.