I'll start off by saying I'm in Canada, where none of carriers offer the P800.
I was thinking of buying an unlocked P800 from www.orangewavewireless.com (the only Canadian reseller I could find). I'm curious to know, can I just pop the SIM card out of my current GSM phone, and put it in the P800 and it'll all just work?
(sorry for such a newb question..)