Tap the Google Search Widget on the Home screen.
Google Now opens automatically and you can use the on-screen keyboard to search.
Voice Search
Tap here to search by voice.
Enter the text you’re searching for in the search box.
As you type, search results from your phone, previous search terms, and web search suggestions appear. Tap an item to activate that search result.
Tap the Search Key on the on-screen keyboard to search for the text you entered in the search box.