I just switched to an m370 after my previous m330 died beyond repair. I'm very frustrated by one "feature" of this new phone. I don't want it to make *any* noise when I get a text message, so I have the "Ringer" for "Messages" set to "No Ringer." In fact there is noise when the message comes in, but if I don't happen to use the phone for a minutes then after a while the phone will beep twice to indicate the missed message.
I've searched menus on phone, searched the manual, spent several lengthy sessions on the phone with Sprint tech support, and visited Sprint store, and Googled (the last is what led me to this forum!) -- I'm fairly well convinced that it's just not possible to turn off those beeps. But I'm posting here hoping that... (continues)
Having just purchased one if these ohones myself, I feel yoiur pain. Like you I immediately started trying to figure out how to turn off that obnoxious missed message beep. It sounds if you do not check your phone within about two minutes of having received a call or text message. The "feature" makes no sense because it exists outisde the ringer or alarm functions of the phone. There appears to be no way to kill it, while till maintaining any type of audio ring tone.
Also, like you, I called both SPRINT and SAMSUNG technical support. I talked with very nice people, but because this alleged feature is not even described in the manual for this phone, they did not know what I was talking about or how to help me turn it off.