Why is there a red dot on my phone camera?

Why is there a red dot on my phone camera? If the infrared beams are reflected by a highly reflective object and captured by the camera lens, red dots will appear on the photos. When taking a close-up photo in low light, infrared beams emitted by the laser autofocus device may cause a brightness change and a long exposure, resulting in the red dots.

If the infrared beams are reflected by a highly reflective object and captured by the camera lens, red dots will appear on the photos. When taking a close-up photo in low light, infrared beams emitted by the laser autofocus device may cause a brightness change and a long exposure, resulting in the red dots.