iPhone trade with Go5G Plus plan

Get up to $830 off with trade on Go5G Plus

I have a question about iPhone upgrade promotion. I’m using Go5G Plus with iPhone14. I was using this plan and my phone for over a year.

If I upgrade to iPhone16 with $830 credit and change my Go5G Plus plan to Basic plan after the purchase, can I still get $830 credit? Do I need to keep Go5G Plus plan after the purchase to receive the full $830 credit?