I'll be visiting Australia over New Years and I'll most likely be bringing my N1 with me to use over there. (Unless a bag of cash lands in my lap when the next Nexus comes out.) It's the US TMO version. I'm wondering which pre-paid carrier will work best with it? I'll be there three weeks and haven't a clue what I'll be doing besides Sydney but I suspect I'll be getting out of the city a bit. I know in Ireland I used O2 prepaid and it was a really amazing deal.