There is always a small bright spot in the middle of the screen when the mobile phone is shooting the sun.

This is a common problem in backlight photography.

This situation is commonly known as "ghost". It is the reflection of light in this lens. Both cameras and video cameras have this phenomenon. The more lens groups, the more ghosts, forming a long string of light spots.

This happens when facing a bright light source. This is determined by the lens structure. You can try to adjust the angle to avoid ghosts.

Take photos of eye protection lights with your mobile phone. If the eye protection lamp is strobed, when the camera of the mobile phone is aimed at the eye protection lamp, the stripe stroboscopic phenomenon will appear on the screen of the mobile phone. "The more serious the stroboscopic, the less recommended it is to buy. Try to choose stroboscopic-free.