I have a iPhone 13 Pro and need to have the back replaced. I was planning to have it fixed but would Apple give me the full $230 trade in value if I upgraded instead of repairing? If not, I'll get it repaired and keep it as a backup.
If either the screen or the back glass is damaged, Apple will classify the phone as having “no trade-in value”, meaning you won’t receive any credit. They will, however, happily recycle it for you at no cost; how generous of them!
Best bet keep the old phone, put a case on it, use it a back up and buy the new one or a while back some of the carriers were offering trade in any phone in any condition.