When I got to Settings>Sound & Display>Phone Ringtone, I only get one option "Silent" to select as ringtone (which is selected by default). As a result, I dont get any audio notification of incoming calls which is really bad as I miss on so many calls. I read somewhere that this problem was because of Apollo Task manager being installed. However, I do not have Apollo Task Manager. Attempts so far: I tried factory reset few times but no help. Then I removed the battery and left the phone for sometime to no avail. I see mention of this problem at many places, but no solution. Can someone help us fix this problem? Phone: Samsung Galaxy Spica (I5700) on Android 2.1.