How to Enable Voice Command for Apps

After Samsung has been updated the galaxy S3 devices to jelly bean 4.1.1 and 4.1.2 

accessing to "Voice cmd for apps" from settings has been removed
With "Voice cmd for apps" feature you can answer manage apps by your voice
- Incoming calls :
You can answer or reject calls with the voice commands Answer and Reject.
Speaker will turn on when you answer a call using voice command
- Alarm :
You can stop or snooze alarms with the voice commands Stop and Snooze
- Camera :
You can take pictures with voice commands Smile, Cheese, Capture and Shoot
- Music :
You can control the music player with the voice commands Next, Previous, Pause, Play, Volume Up, and Volume Down
- Radio :
You can control the FM radio with the voice commands Next, Previous, Stop, Play, Volume Up and Volume Down

How to enable Voice CMD for apps ?
- Open "Widgets" then Search and Enable "Smart switch" widget
Or
1- Open the "S Voice" app
2- Tap the "Menu" button
3- Select "Settings" then Scroll down and select "Voice control"

Enable/Disable each voice command feature you would like to use

YT Video link : http://www.youtube.com/watch?v=YS7m5LhrRlc