I got the same problem recently, may be about a week, as I see most of the people posting here got this problem last 1-2 months, so obviously it is something with an update of an app and unfortunatelly I do not know what I recently uptated as well. It heats up when when I connect to wifi and start using the internet, after a little the internet dies but it shows that I am still connected to the network, the battery dies shortly after. Only reboot fix is it. When I am not connected to internet the phone is working fine. Any ideas now what I can do...??? Really need to do something cause I bought the phone becuase of Skype and so without internet it is just useless for me...