Ed here are the current phone deals with Verizon. You can get up to a $750 credit toward a new iphone 12 when you trade in your old phone. I don't know what they will give you for an i6. If you just want a new phone for the Mrs. and want service and everything else to stay the same then buying from Verizon is your smoothest course. Good luck.
https://www.techradar.com/deals/the-...ales-discounts