Question about trade in

Hi so I'm getting a new phone and I declined the offer of trade in And getting a $1000 credit And decided to just keep my old phone And still get the new one The only reason why I decided to keep my older one even though I'm not going to be using it anymore is because it was a note 20 Ultra and they don't make notes anymore But now I'm questioning if I made the right decision And should I have just did the trade in option And get my new phone plus The a $1000 credit Also what kind of credit is it?