iOS 13.1 will tell you that your replaced screen isn't genuine

Along with the new iOS 13 features, there will be some changes that not everyone would like. Case in point the the CPU throttling "feature" that Apple introduced with the rollout of iOS 13.1. Another thing that might put you off is the notification that would appear in case you've changed your screen with a non-genuine one.

In an official statement by Apple, all handsets from the iPhone 11 family will prompt you with a message on the lock screen that your panel isn't genuine, or the repair wasn't performed by a certified Apple technician. This message will go on for four days and then will move in the main settings menu for another 15 days. After that, it will remain for good in Settings > General > About.

It's unclear if the this would become a thing for older iPhones as Apple has included only the iPhone 11, 11 Pro and 11 Pro Max in the announcement. The company also took the time to warn users what may occur if they change their screen in a non-certified repair shop:

• Multi-Touch might not respond on parts of the screen
• Degraded Multi-Touch performance, such as missed screen touches or touches not registering in the right location
• Touches might unexpectedly register during a phone call
• Display might not turn off during phone calls
• Accidental edge or palm touches might register
• True Tone display doesn't function correctly
• Lost or degraded function of the ambient light sensor, causing the screen to dim or brighten incorrectly
• Incorrect display color calibration, such as the display to appearing too yellow or blue
• Display isn't uniformly bright
• Lower maximum brightness
• Unintentional battery drain

To be fair, Apple did update its repair policy, which is now a lot more liberal when it comes to out-of-warranty repairs.

Source