Display defective

Hi there aadreesha,

We see what you mean in that screenshot about the black spot showing on your display. The first thing to confirm is if you see it regardless of which app you have open. If it is showing on any other light display, picture, or app, the issue would be more specific to your display. For issues like those, you'll want to have your iPhone inspected physically at an Apple service location.

You can locate service near you here: Find Locations

Here are tips to get your iPhone ready for service: Get your iPhone, iPad, or iPod touch ready for service - Apple Support

If you only see that black spot in the Phone app, it would be app specific. The best steps for that is to force close the Phone app and restart your iPhone.

Close an app on your iPhone or iPod touch - Apple Support

Restart your iPhone - Apple Support

Take care.