Thanks to a Spanish Nexus 4, we now know what caused the rattling.
It has nothing to do with the camera autofocus. This is funny cause I read so many comments from people who could swear it was due to that.
It's a small metallic part piston that is used to remove the sim tray.
Try pushing that thing in, as if you were going to remove the sim, but keep it pushed in. Shake your phone. No rattling.
The guy explains how to fix this
Solucionar Sonido de Nexus 4 - YouTube
Again, how do you call the above, if not "poor quality" control in place at some of the factories?
It has nothing to do with the camera autofocus. This is funny cause I read so many comments from people who could swear it was due to that.
It's a small metallic part piston that is used to remove the sim tray.
Try pushing that thing in, as if you were going to remove the sim, but keep it pushed in. Shake your phone. No rattling.
The guy explains how to fix this
Solucionar Sonido de Nexus 4 - YouTube
Again, how do you call the above, if not "poor quality" control in place at some of the factories?