read the damn spec sheet it answeres pretty much all questions
http://now.sprint.com/evo/?ECID=vanity:evo only thing im not sure about is core but im sure there is.
its got its own official mifi so no hacking needed
hdmi plug is for a tv
mifi is pretty much the same as tethering.
ive connected to heros and droids with my tp2 via bluetooth.