LG :: Voyager Turning Off Missed Call Sound??

does anyone know of a way to turn off the sound that happens immediately after a missed call? I have some idiot friends that will go out drinking and periodically call me at 1am when I have to get up at 6am for work. I also have an elderly gentleman that will call my number in the middle of the night, thinking I am his son (my number and his son's number must be very similar). I can set the ringer to "No Ring" for these people, I can turn off vmail alerts, I can turn off text alerts...but none of it matters because when one of them calls, I still wake up due to the missed call sound that happens immediately after the call. I can't just put the phone on silent because I would need to be alerted if some type of emergency would happen with my family. I could just get a landline and put the phone on silent, but I would rather not shell out the extra $$ due to a poorly thought out missed call sound on a cell phone. Really, what is the point of including a "no ring" feature for an individual person, if you can't turn off the missed call sound? In reality, what happens is the missed call sound becomes person's ring tone.Also, does the Envy Touch have this problem? I am due for a new phone in the spring and was looking at purchasing this one.