I've had a myTouch 4g since June. twice now I've lost all sound from the external speaker. My phone no longer rings. I've tried: Factory Reset Downgrade from Gingerbread to FroYo Upgrade from FroYo to Gingerbread Download a volume control app (all is maxed, also this fixed it last time). Any other ideas, or do I have a useless phone now. (The T-mobile rep that upgraded my phone saw the engineering hBoot, and busted me for being rooted).