I placed a pre-order for a black (not JB) 128gb + through Apple, but got a rather late shipping date of Oct 5-Oct 11. This is my first time doing a pre-order, so I want to make sure I do everything correctly. I got lucky and bought a phone on launch day last year. Im planning on going to a local ATT store on launch day (possibly Apple store Friday night) to see if I can snag the same phone a few weeks early. My question is, am I able to simply show up, find the model I want and cancel the Apple order a few minutes before checking out? I ordered using ATT Next and plan to do the same if I can find one in store, so this mostly pertains to ATT Next availability. My Apple order still shows processing with the ability to cancel, which is not a surprise given my ship date. Thanks in advance!