You can use voice controls with the S Voice app from the lock screen of your Samsung Galaxy S6, even if it is actively locked. So you can use voice commands to write calls or SMS messages, without unlocking the lock screen.
However, you need to enable this feature within S Voicefirst.
Open the "S Voice" app and tap then in the S Voice bar left on the gear icon to display the settings.
In the settings you can find now the option:
- Wake up in secured lock
Drag the slider to enable that feature on your Samsung Galaxy S6. This allows you to start calls, take pictures, performtasks or play music by voice commands without having to unlock the Samsung Galaxy S6.
You know now, how to activate voice commands for S Voice from the lock screen.