It should be native with the S3. Just be sure you have Google Voice Typing turned on in settings.
Settings / Language and input / check Google voice typing
When you are imputing text, tap the microphone icon next to the space bar.
If you can't turn on GVT, use another keyboard app as AA mentioned, such as Swype, SwiftKey, or reinstall Google Keyboard
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.