Chosen Solution

I have an iPhone 7 that needs a screen replacement but it’s not the original screen and the prior repair didn’t transfer the MtSN code.

I have an original screen from an iPhone 8. Could I copy the MtSN code from that screen and transfer it to the new iPhone 7 screen? Or is it logged to the logic card, and need to be copied from the screen the phone was build with?

You would need the original screen the phone came with to transfer that code. Why do you need it anyways?