iPhone 12 Pro Max replacement screen does not fit.
My son's iPhone 12 Pro Max screen broke we ordered a new one, but on arrival, it doesn't fit the one we took off is a lot thinner and totally flat with the one that's come has like little things that need to slotting round the edges, on looking it says his model number is mgd73b/a I've never seen this before and can't seem to find anything about it online. Does anybody have any help or know where I can get a screen that will fit? Thanks
iPhone 12 Pro Max