http://www.youtube.com/watch?v=Kz4TK...x=0&playnext=1 this video isnt carrier branded just HTC-no 3.5mm jack on it.. also if you pause it when he takes the battery cover off, u can see that the gap at the bottom is roughly the same size as the pics in the link on ebay for battery covers..
and this one
http://www.youtube.com/watch?v=Kz4TK...x=0&playnext=1
this one is the t-mobile TP2, pause it at 30seconds... notice no 3.5mm jack again???
thats 2 different TP2s the back cover are completely different, so we know its really 2 diff