I know I can enable or disable this option, I personally prefer it disabled or at least I thought it was but sometimes a call will ring normally while others it appears to just ring untill I move the phone and the phone continues to vibrate. While in hospital recently this caused me to miss several calls. It's driving me mad and causing premature baldness as I'm pulling the hair out of my head trying to find a solution. I constantly enable then disable the "Quiet Ring On Pickup" option and reboot but it keeps happening randomly. I have a Hero with the 2.1 update. Any ideas would be very much appreciated as I'm running out of hair and patience at this stage, otherwise I love my phone.