If your picture is rejected, your phone screen is damaged, or we can't clearly see the image, your phone can’t be validated. If it is clearly damaged, your policy will be immediately cancelled as buying an insurance policy with a pre-damaged phone is a fraud and an offence.
If we can't see the picture clearly, you will get an invalid notification with feedback on what went wrong. You would then need to try again, make sure you are in a brightly lit room and your mirror and your phone's lens is clean.