I have been trying to reserve randomly in different states and I always get the message that says it's unavailable at the moment. Are they no longer offering reserve and pickup? Would seem pretty odd seeing how as soon as some phones show up in stock they disappear, as if someone was reserving...
You must reserve the phone on the apple website to buy one in the 25th in the store, you will not be able to buy one if you don't reserve one online.
You can download the Apple app in the app store or go to the website to reserve the phone.
Apple upgrade plan will only be available in the store...