For heating issue follow the given link: http://www.samsung.com/in/support/skp/faq/1119803 1- Make sure that 20% internal storage is free for which clear the RAM memory and storage of device (Settings > Device care > Memory/Storage > Clean Now). 2- Stop the background running app (Tap on the left soft key and close all the running apps). For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > click on “+“icon > send feedback > error report/ask questions).
it might be possible that outdoor temperature is more. that can affect the working of any smartphone. for example if your smartphone is running under a high temperature condition, it will heat up, no matter what you do. all you can do is let the phone rest in an open well ventilated area. and let it cool down. and refrain from using it in extreme temperature condition.
Secondly ut may be a hardware issue, which rarely happens. if the above doesnt help, you are requested to visit a service center.
