This is Genuin camera Why important camera message come? Please remove this
Please remove important message from my device
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If you've had the camera replaced by a non-Apple authorized repair shop, then they replaced it with a third party camera and that is why you are seeing that message.
If it is the original camera, then there is a hardware defect. Make an appointment at the Genius Bar to have it diagnosed.
Genius Bar Reservation and Apple Support Options - Apple