I just ordered an unlocked Google Nexus One for use on AT&T in the USA. How do I get started using it and activate it? I was on Verizon, so I don't have any SIM card to move to the Nexus One. Do I go to an AT&T store or Best Buy and just buy a SIM card and activate AT&T (non-contract) service? I've been on Verizon for so long that I don't know how things work with a SIM card. There also isn't much info on the Google Nexus One website about using AT&T. Seems like it's more tailored to T-Mobile. I would like to be able use the N1 as soon as possible after it arrives tomorrow!