I got to thinking... If a customer upgrades their phone every two years and activated their last phone on the release date for the 5s (9/20/13) and Apple releases the 6s on the 18th this year, that would make millions of 5s release date purchasers ineligible to upgrade until two days after release. In fact, no one with a 5s would be able to upgrade until after release date. Historically, has Apple kept this in mind? Basically, if the 6S is released before the 20th, they could isolate those who always stand in line on release dates.