[Primenall]

Yeah it's a combo of everything radio, charging(especially with fast charge dll), and of course the processer, I've tried pretty much every radio and haven't noticed much of a difference at all.

Mine gets hot enough to fry eggs on, I usually take the back off for tethering.

It gets soooo hot using wifirouter (wifi) and downloading newgroups (radio and processer cranking out), plus the heat from ac charging and it's ready to burst into flames, with the back off it will keep charging at least, not the case if left on.