HTC P3600i
 

I recently went on a trip to Australia and found this phone at a very good price. It is unlocked and seems to work with my provider fairly well. I am with Rogers in Canada. Although sometimes it doesnt ring at all when calls come in, otherwise this is probably the best phone I have ever owned.

Does anyone know where I can get a firmware/rom update for this phone?

Check over on the XDA Developers forums.

Re: HTC P3600i
 

at this time there are no cooked roms only minor customizations