Activating my phone when I get home tonight! Question is this: when I signed up, I picked the 200MB plan ($15) instead of the 2GB plan ($25). However I for some reason didn't notice that with my company's FAN discount, the $25 is actually $18.75. With it being only $3.75 more, I'd rather have the 2GB. Am I locked into the same data plan during my 2-year contract or can I change it?