As reported by Cult of Mac, the bug is called the "black dot of death," but it's not actually ... is to use 3D Touch on the Messages icon on the iPhone's home screen. Push hard and you'll see ...

To be clear, there really are 12 black dots in the image. But (most) people can’t see all 12 dots at the same time, which is driving people nuts. “They think, ‘It’s an existential crisis ...