I have posted this question in a different thread and have searched and have not found the answer. My understanding is if you pre order for in-store pick up they do not charge you for the phone till pick up, yet reserve an iPhone for you. Not sure if I am using the right word here but do they guarantee a phone for you at the store. I am not able to arrive till later on the release day and for them to run out prior to arrival. Thanks in advance.