Nokia 6682 / 6681

I would like to get some input on a problem that may be related to the cleared call log problems, but may have a different cause. If my phone is off when a call is made to me, I am not notified of a missed call when my phone is turned back on. It seems to me that when Cingular becomes aware that my phone is back on the network, the missed call message would be sent. If my phone is on and I do not answer, I am notified of a missed call.