Does anyone know how to turn off the service notification beeps? I've looked and looked and can't find the option. Don't know if it's not there or i'm just overlooking it. I live in an area where cell service pretty much does not exist. Well, it does exist, but i'm in a dead spot. Anyway, every few seconds to every few minutes i'm annoyed with a chirp each time the service is either lost or reconnected. All I want to do is turn the chirp off! Any suggestions?