One more feature, available in the Android 6.0.x Marshmallow smartphone and devices, is to set the vibrate along with the sound of the ringtone in case of any incoming calls. Some of the users, who have to work in the noisy environment, usually like to set the vibrator in their mobile phones in addition to sound of ringtone so that they may not miss the sound of the ringtone of the incoming calls.
If you feel any need to set the vibrate in addition to the sound of ringtone, you may see the instructions.
1: Tap the icon of the ‘Dialer’ app at the bottom left corner of your Android 6.0.x Marshmallow smartphone and smart device to open up ‘Dialer’ app screen.2: At the ‘Dialer’ app screen, tap the 3-digit setting button, placed at the top right corner of the screen but immediately below the status bar. It will open up a popup menu.3: At the popup menu, tap the ‘Settings’.4: At the ‘Settings’ screen, tap the ‘Sounds and vibration’.5: At the ‘Sounds and vibration’ screen, see; the ‘Also vibrate for calls’ is not checked, i.e. not activated and enabled.6: Tap it to activate.From now-ward, your Android 6.0.x Marshmallow smartphone will also vibrate in addition to the sound of the ringtone for every incoming calls.