The app did not give an option to select another day so I have a 30 minute window to check in to upgrade via the Apple Upgrade Program. Does anyone know if having a reservation will still require waiting in line? The confirmation email says to allow 30 minutes to complete the transaction, but that does not mean there will not be a wait or a line to start the transaction. I'm actually getting two phones and had to select different stores, so I'm concerned that I may be late to the second one and not sure how long they will keep the phone for me. So two questions: 1) Waiting with reservation and 2) How long will they hold the phone if late. Thanks.