HTC HD2 Smartphone "silent mode tech phones" Questions

...silent mode My phone somehow is stuck on silent mode and I do not have my manual. It is model # sch-r210. How do I get it off silent mode? i just called tech support..hold the # key to turn silent ...

...silent mode so I changed the profile but still it doesn't work. I also found an icon in the screen beside the 3G symbol that wasn't there before.It looked like one big cirle connected to a small ...