Just got my new, White S4 today, not certified refurbished but brand new. Unboxed it, put the battery in, back cover on and started the setup assistant. After the setup assistant was finished (2-5 minutes) the phone was warm. I didn't think anything about it. An hour later, it was uncomfortable to hold, especially around the rear battery area and the front of the glass screen. I am afraid if I take it back to the store ( i ordered it through tech support over the phone) they will try to give me a refurbished one. Don't know what to do. It even stays real hot while not charging with the screen off.