I don't appear to see a Galaxy S22 thread, so starting one.
Anyone still on Sprint billing able to figure out how you find trade in deal/promotion, particularly if you're still in installments on an S21? Supposedly 'up to $500 off' for regular Sprint plans with trade in from what I've Googled.
However, if I go in in upgrade mode on my account, and I try the one-time-payoff method going through my online account, while it does finally open up the 'offers' portion, none of them