This camera can rattle by design. When motor closes the camera it is relatively tight until you place zenfone in a loose pocket and start moving or put down a few times on a solid surface. Then it gets loose and starts rattling. In that case you can light up your screen and tap the camera housing a few times (it will retract automatically) or click power button a few times (every time it corrects a bit). For sound dampening effect I've placed a bit of insulation tape into the hole, however it certainly will rattle from time to time. I hope it won't get worse after a year or two.