AT&T keeps tempting me with a $700 credit if I trade-in my iPhone 12 Pro. I usually keep my old phones so I never notice if there is a trade-in offer when I buy one. No reason to keep it so I'd like to take advantage of a substantial discount if there is one available. Does Apple or AT&T usually have a trade-in offer when new phones are released? Worst case I could wait a few months. There are usually plenty of offers around the holidays.