I completed an order for an iPhone 6+ and two iPhone 6 on September 20th while AT&T had a $200/phone trade-in deal going on. I checked and T-Mobile quoted me at $200 for each of my trade-in phones (a Verizon iPhone 4S 16gb and two Verizon iPhone 4 8gb). I finally got my iPhone 6's in yesterday but when I went to do the trade-in I was getting quoted at $79 for the 4S and $29 for the 4. I managed to find the AT&T offer (https://web.archive.org/web/20140915195527/http://www.att.com/shop/wireless/iphone-trade-in.html) which clearly states that an order placed before the 30th of September would receive the $200 credit even if the trade-in wasn't completed by that date.
I submitted a trade-in guarantee instead of accepting the lower trade-in value... but what happens now? The rep I talked to said I should hang on to the phones while it's processed, but the mail submission form on the T-Mobile's website (https://www.t-mobiletradeinguarantee.com/Content/Pdf/TIGForm.pdf) makes it sound like I should have sent in the phones at the lower price and then submitted the claim. I want to make sure this doesn't delay my ETF reimbursement because I'm going to get slammed by Verizon. I'm very confused, please help!