I don't know why my vibrating alerts don't work know, It's work well during 8 month ???

where I could check the problemn it's seems a hardware problem.

if your phone doesn't vibrate at all, you may have gotten the chip board wet, i;ve seen this happen loads of times, and when the phone doesn't ring either but just vibrates.

y phone doesnt ring when it's being charged. Try taking it off the charger and see if it works then.

If this doesn't help, I recommend goingto to the Nokia well umm phone place thing :)