Here's how you can turn on the Talkback accessibility tool for blind or low vision users on your Android Jelly Bean device.
1. Go to Settings.
2. Under the System section, tap on Accessibility.
3. Turn on the Talkback option.
4. A tutorial will appear that will teach you how to use Talkback.
For more, see the original article at the link below.
50 Android Jelly Bean tips, tricks and hints | Tech Radar
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