I don't get it...how the switching works, and charges So with the Sidekick $1/day (pay-as-you-go) you can only either talk for a day, or surf the internet without receiving any calls? If I want internet for school work, and later that day talk to a friend, I'd have to pay $2?? And then if I need internet again, I have to pay another $1? Or is it no extra to use internet as long as you switch back to voice before 12? How do they know, the next day (at 12 when the charge me), whether to put me on the voice option of data option?