If your phone (not your headset) has a physical "call" button (N1 doesn't) and long-pressing it doesn't launch Voice Search, this quick hack can help. Source on website. No settings/icon/"Open", just responds to green button. To turn off, uninstall.
Might need to click "use by default" & this app the first time.
Search on green is a free trial software application from the Other subcategory, part of the Communications category.
The app is currently available in English and it was last updated on 2009-10-19. The program can be installed on Android 1.6 and up.
Search on green (version 1) has a file size of 6.61 MB and is available for download from our website.
Just click the green Download button above to start. Until now the program was downloaded 228 times.
We already checked that the download link to be safe, however for your own protection we recommend that you scan the downloaded software with your antivirus.