Yes, you're definitely technically correct. That definitely makes since, especially for the camera. Although, we don't necessarily know if dust entered the camera after the installation during whatever stage comes next. But as far the dust, debris, or whatever it is, in between the bezels...that is possibly more likely to have entered post-assembly, since the reason it may be in there is the large space between the bezel and the seal / glass, which is easily penetrated by dust, or even toothpicks. Some of that 'debris' may possibly be sealant or adhesive for the bezels that just doesn't keep them sealed, but much of it is definitely wipeable and movable with a rag or toothpick and certainly looks like large dust particles.
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Hopefully!
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That is insane! I've never had a major scratch come on any of the phones. Thank you so much for sharing! Exactly what I created this thread for.
Are you like this with all of the things that you buy? Not being personal, but it may explain a lot.