When you pre-order, do you pay up-front and they send it to you at release with nothing else to do on your end? If so, does that effectively lock you in from the date of the pre-order or from the date of activation? Also, we're not officially able to upgrade until June 20th, and we're hearing rumors of June 21st for the GS3. So would we even be able to pre-order on the 6th? Thanks!