Lately I have been working on Android platform. If you are behind a proxy in your company and working with the simulator here are the steps to get the browser working
Settings -> Wireless Networks ->mobile networks-> access point names->telkila. Now enter the proxy server address and port (which will be 80).
However, if you are working with WebView control in your app then above will not work unless your code has following line in onCreate()
You might want to restart the emulator after this to test your app again.