iPhone 13 Pro Max on Backorder

Hi guys I just wanted to let you all know about my experience. On December 5th I placed an order for my Iphone 13 pro max  in the store shipping date December 28 - January 11. Today I saw that the phone was in stock and I was wondering if I can get the same shipment day on the same order. While on the phone with T-mobile customer service, they advised me that it would be best to just cancel my original order and make a new order with the new shipping date December 7 - 11. They transferred all of the original promotions from the first order and even gave me free 2 day shipping. Just make sure all of the promotions are correct and expect a decently lengthy process (2.5 hours at least on the phone). Hopefully this gives you guys hope or helps you guys get your phones a bit earlier. Ask me any questions and Merry Christmas!