So, I preordered an iPhone 11 Pro Max 256 GB. I selected Apple store pickup as the option. I am looking to exchange this phone already for the 64 GB iPhone 11 Pro Max as I figured out I don't need that extra storage space. My question is if anyone has had experience exchanging phones during release day? My check in time is 8:30 AM. Will they be able to do this right when I get in or will I have to go into a general line? Thanks for any help in advance!