First of all, it creates a blur in the lower left of photos taken with flash. Second, and more importantly, it caused me a temporary problem with my phone's sound. Yes, indeed, as soon as I removed it, it was fixed. It may have been because the cutout for the 4th "camera-flash" of the Xiaomi 17 is excessively small and, combined with the phone case, it was being "choked" and the phone's speaker system went haywire, making crackling noises until I realized that the camera protector was the cause. So the cutout design for the 4th "camera" is completely wrong. Therefore, only someone who doesn't use any case on the phone should use it. Only then.