I I use my alarm clock about twice a day on all my phones, but two of them after a while( about 4 month) the alarm funtion either doesnt go off or goes off randomly. The calander funtion has a seprate alarm which was more reliable then the phones actual alarm but it takes longer to set and takes up more memory. I currently have new 3200, i think nokia may have fixed the problem but i wont know for a few mounths.