I have bought my HTC Incredible S in Singapore on 21st June 2011, used it for nearly 2 months then suddenly the sound vanished. There is no notification sounds (when receiving messages), I wouldn't know if someone is calling me since there is no ring tone, there is no sound when playing games, there is no sound when playing the music. I have tried checking the setting and even did a factory reset, nothing works for me. Oddly, when switching on the phone, there is a sound but only up to this point. My phone also did not vibrate anymore. Any one know whats wrong?