Hi, Jay!
I spoke with countless representatives on this, I've gotten beyond imagination. Here's the solution: a backorder cannot be immediately cancelled, but if you nag them enough, they will hurry it. Once the order is cancelled and you are told by everyone so, you'll learn that you still don't have a confirmation email, and the order still shows on your end. Then, they'll tell you they're submitting a hafsa research/search/whatever, which cancels it immediately. Nope, you still can't jump because they already switched the IMEI numbers, and you appear as not qualified for Jump. They will cancel that too, but it will take another 24 hours for it to show.
I called Tmobile at least 7 times today. That's the newest update: I need to wait until 12:30 tomorrow to be able to Jump. I am writing a long letter to corporate because I find this to be extremely annoying and aggravating. I do not have to go through all this every time a phone comes out and I want it. This is ridiculous. They need to offer me some sort of incentive to remain in this idiotic company. Otherwise, I am finishing paying everything and I'm leaving.
They will not give you a time frame for when the phones will be available to ship out. Nor will they immediately cancel the existing order. Anything you do from this point on will only irritate you beyond belief. Apparently, the whole cancelling a backorder and jump is new to all of them so they're figuring out how to manipulate the system so I can get out of it and jump in the store. Let alone that I spoke with so many representatives, this entire time I have only been dealing with the store manager who is holding a Note 4 for me, in white. If something happens to it, if they sell it, or whatever else, there will be no Nth chance. I am disgusted with this company.