TalkBack is an accessibility service that helps blind and vision-impaired users interact with their devices.TalkBack adds spoken, audible, and vibration feedback to your device. TalkBack comes pre-installed on most Android devices.
For help with TalkBack, visit https://support.google.com/talkback/
To turn on TalkBack:1. Go to Settings2. Select Accessibility
Android 4.1 and above:3. Touch TalkBack and switch it on
Android 4.0:3. Touch TalkBack and switch it on4. Go back to the previous screen, then turn on Explore by Touch
Android 3.2 and earlier:3. Select the Accessibility checkbox4. Select the TalkBack checkbox