I am continuously frustrated by my phone going into "silent mode" and then I miss calls, because it doesn't ring. Occasionally, I will have the phone out and see one appear on the screen... but others, I get no notification until I happen to look at my visual voice mail app or call log. I can't figure out what is causing this. Must be something I am doing or some app I am using which turns on silent mode? Does the music player do that? I saw in one post where someone mentioned a "silent" button. No reference to that in the (very weak) manual. I don't know what button that is... unless it's the power button at the top which I use to get the screen back on when it goes dark. Is that turning the sound off? I have seen this same problem mentioned by those who are frustrated with the phone and are making plans to return it. I'm not one of those, because I really like the power of the Droid, but I need a solution for this. I downloaded the "Where's my Droid?" app which will turn off silent mode (and ring it) if I text it with a code phrase from another phone or online. Perhaps there is an app which will stop this madness of going into silent mode when I don't want it to. This is quite a dilemma for me. I need to keep the sound on so I can get business calls.