Voice Search is very useful feature, which makes you mobile Internet searching a lot easier. To use just startup the Google App by pressing the 'c' key and hold down the green calling key and speak your search, its so simple to use.
Check out this video from Google India,to know search by voice and other cool features.
"Downloading the Google Mobile App places a shortcut to Google search on your Nokia phone's home screen. It's now fast and easy to search for anything on the Internet. Holding down the call button activates voice search so you can speak your query. Search by voice is not limited to simple queries. Try complex queries like -- "pictures of gateway of India", "what is the length of a cricket pitch", or even something very Indian like "makki ki roti and sarson ka saag recipe"."
Visit m.google.com on your Device to get Google Mobile App v2.03.
