Unusual display marks on my old iPhone 12

It could be the screen starting to delaminate. You’ll need to have it inspected by Apple or Apple Authorized Service Provider.

Contact Apple for support and service - Apple Support

Apple Authorized Service Provider

Genius Bar Reservation and Apple

Support Options - Apple

Hello~ In addition to *Jeff Donald’s* pertinent information…do you have a screen protector on? Has the iPhone been exposed to excessive heat or cold? Is there anything that would indicate the battery swelling?

~Katana-San~

There are coatings on the top layer of the screen it’s possible something has removed some of the coatings. The pattern is unusual though. Apple will be able to tell.

You’re welcome and happy holidays!

MilicaDi wrote:

Thank you, Jeff, for the fast reply!

But I think there is not a problem with the screen, it works well.

I think that there is some problem with the top layer of the display, I don’t know how it is called, sorry.

Please, if you have any guessworks why it was happened, tell me. It is very strange, I think.

And, yes, I’ll go the Apple service.

Jeff has offered the only advice anyone can offer you. Schedule an appointment at your Apple Store Genius Bar or Apple Authorized Service Provider for evaluation and options. No one here can tell you what the problem is.

You’ll need to have Apple examine the screen. No one here can replace your screen.

Hello~ Then take it in to Apple and have it checked out as Jeff suggested. Take care.

~Katana-San~