If I get the $60 / month Go Phone plan, I get 2 gigs of data. I am confused by the wording on going over 2 gigs. Do I pay $10 for each 1 gig I go over, or do I only get 1 extra gig for $10? IE, if I want 4 gig's of data, is that possible? That would be $60 (base price, 2 gigs) + $10 1 gig + $10 1 gig. Or after I pay $10 for the extra gig, is my data cut off until the next billing cycle?