IPhone 4s works like Frying pan

Ibrahim H Darwish
edited March 2014 in iPhone Forum
i have an iphone 4s with IOS 7.1 ...!
i think it was good but the whole problem facing me the battery life, when i enable 3G and using it the battery decreases very fast appx 1% or 2% per min and the whole device being very hot ....!
maybe i can make an eggs on its heating :(
2nd thing is that the auto brightness is enabled but the brightness doesn't change no matter i'm under sunlight or at dark ???
so the problem in the device or caused by IOS >??