Go to mobile terminal, or you can connect to your ipod with ssh. find /var/mobile/Applications -name "Google.app" you will find something like this /var/mobile/Applications/D9ACA198-F9F6-4BA8-A49B-55DBB6A5072C/Google.app then goto /var/mobile/Applications/D9ACA198-F9F6-4BA8-A49B-55DBB6A5072C/Library/Preferences, download com.google.GoogleMobile.plist to your PC/MAC, find <key>kGMOPrefVoiceSearch</key> <false/> Change false to true. save and upload this file to over write the original one. Plug in your mic, start Google Mobile app, enjoy!!!