Okay, I'm a bout to order a Nexus from Google. I want to activate it on T-Mobile, whom I do not have an account with. I heard you can just order the $0.99 sim card on their site and you're good to go. But today at BestBuy I saw a T-Mobile activation kit for $20 that included a sim card. So, my question is, do I need the activation kit or just the sim card to get all set up? Is this $0.99 sim only for T-Mobile branded phones? Thanks