ok I ordered a 128GB 7+ matte black on 09/10. It says it won't ship until 10/12. Will I still be able to trade in my 6+ for the $650? I'm worried that they'll all of a sudden say they'll say "we met the number of trade ins allowed already" or "it's too late for that promotion." Anyone know for sure? I also did this online so if I understand this correctly when I get the 7+ I request trade in for my 6+ online as well or do I take it to store? Been unclear for me from start.