What have i got?
 

Under the battery it has:

ELF0100
HTC P3450
P/N: 99HDM033-00

What do i need to upgrade the OS?

Re: What have i got?
 

Well it's not a Vogue... they look the same, but yours is GSM, and the Vogue is CDMA I think....sometinhg like that.

I don't recall seeing a section on ppcgeeks for that device, might wanna search xda-developers for it.

Re: What have i got?
 

To add on to what EtrnlWolf posted, the forum your looking for is here: http://forum.xda-developers.com/forumdisplay.php?f=374 Great info in that one. Hope it helps.