I chose to trade in an iPhone for the newer iPhone 15 Pro, based on Verizon's stated offer of $830 trade in credit as long as the traded device was as promised and the plan was switched to one of 2: Ultimate Plus or Ultimate Unlimited (I have the screenshot).
Sent in the device (perfect condition), was received ... then Verizon informed me that the promo credit was taken back b/c my plan no longer was eligible. After talking to customer service for an hour I was informed that now the plan had to be Ultimate Unlimited and I was out of luck.
I've been with Verizon for decades but this is a fundamental breakdown in the basic good faith relationship. Will be finishing this agreement and moving elsewhere.