This worked for me on the S4, and you might want to try it on your S7.
On Androids: from the Home screen, touch Apps > Settings > Blocking mode.
In case you also have an iPhone: check settings for Do Not Disturb mode.
This worked for me:
On Androids: from the Home screen, touch Apps > Settings > Blocking mode.
In case you also have an iPhone: check settings for Do Not Disturb mode.