When commenting your friend's status is not enough, you can call or send a message to the friend.
Select > Social.
Select a friend's profile picture.
From the pop-up menu, select View contact info.
Select a communication method.
This feature is available if you have linked your online friends to their contact information in your phone.
The available communication methods vary. To call or send a text message to a friend, the feature needs to be supported by the service.