hii guys,just got my i9500 two days ago,so far i'm satisfied but just wana check,why is that the heat generated seems too much,kinda feel very hot compared to my last hp which is s2,in fact during idle still very hot,not warm...how to check whether its normal or not?

does rooting n install custom rom like wanamlite can help reduce or solve the heat issue? i just bought the octa,money wise not a good move to change to s600...need to topup more la...