Motorola RIZR Z6tv

I really like the missed call alert that I had on my Motorola 325. Most people don't leave me messages, so the only way I know to call people back is by seeing I have a missed call. If I'm at work, I can't by checking my phone every 2 minutes so it's nice to have an alert to tell me that I have missed calls. I have this phone (the Rizr), but I can't find that alert. All I have are alerts for new text message, new pix message, and new voice mail. Does anyone know if the missed call alert is available on this phone, and if so, how to activate it?

Thanks!