Unknown part on iPhone

Either the screen was replaced by a non-authorized dealer using non-authentic parts......or......your screen is acting up and needs to be examined at the Apple Store or an authorized Apple service shop.

The message will remain on your screen until the issue is resolved.

What, you mean the message? No. We can’t remove that. Either the display was replaced by an unauthorized party, or something has failed.

Remove what? Mods do not remove posts unless they violate the rules.