Im currently using an iphone 7 (32gb version) Im planning to buy an iphone 13 , 13 pro or 12 pro or 12 or if i get budget extended may be an iphone 14.

I feel like iphone 13 128gb is enough for me but i have read there is a display whitening or glitch issue after an certain ios update in iphone 13. Im worried over this as if the display become white or glitcg i have no money to replace it cause im spending all my money on the phone when im buying it. I wanna know is this issue is still there or did apple fix this update issue?

Also im consider buying apple certified refurbished phone, but anyone here can tell me is it worth than buying brand new? Im their stores they have iphone 12 and 12pro certainly less than 100$ over a brandnew iphone 12, do these refurbished phones comes with the original display? And a brand new original battery with a battery health of 100%? Do they have scratches and scuffs? Can someone tell me bu experience?

Also if i buy iphone 13 is any advantage buying a 12pro over an iphone 13? Are pro versions better or should i buy 13 because it is latest than 12pro? What is more loaded? And does having 3 lenses always better?

Please advice me. Thanks in advance