My iPhone was bought in the UK but I am using it in Portugal. I have the original O2 SIM card that came with the iphone but I never activated because I did not want to be charged in any way.

Is it even possible for me to activate it from Portugal? If I did, would I incur any charges? anyone done anything like this?

Push notifications was THE feature of 3.0 that I really wanted and it's the only one that doesn't work