My experience/opinion:
I've a 16GB & 32GB 4S. Neither rattled on vibtrate or when shook gently (yes, if you tap near the camera, there's a rattle, imo to be expected).
However, the 16GB phone was replaced after I received it with scratches along the bezel (not scratches from contact scrapes, but looked more like marks from the machining/manufacturing process).
My replacement 16GB phones rattle when it vibrates/shook gently; it's not the mute/volume/power switch, but rather appears to come from within the phone. imo not normal, as not all 4S's are like this (based on a sample size of 3, 2 didn't rattle).
So 2nd phone is going for replacement (third time lucky, maybe). Perhaps wouldn't bother some people, but I'm not willing to accept manufacturing defects on a phone costing £500.
I've a 16GB & 32GB 4S. Neither rattled on vibtrate or when shook gently (yes, if you tap near the camera, there's a rattle, imo to be expected).
However, the 16GB phone was replaced after I received it with scratches along the bezel (not scratches from contact scrapes, but looked more like marks from the machining/manufacturing process).
My replacement 16GB phones rattle when it vibrates/shook gently; it's not the mute/volume/power switch, but rather appears to come from within the phone. imo not normal, as not all 4S's are like this (based on a sample size of 3, 2 didn't rattle).
So 2nd phone is going for replacement (third time lucky, maybe). Perhaps wouldn't bother some people, but I'm not willing to accept manufacturing defects on a phone costing £500.