You can display all users within Directory page. If you tap any of the users displayed, user details which contains summarized profile and contact methods of the user will be displayed.
If you tap any of the contact methods within User Details page, you will be redirected to contact the user according to the selected contact method. Tapping e-mail address of the user will launch iOS Mail app, tapping phone number of the user will perform a phone call using iOS Phone app or will launch iOS Message app. Finally, if you have already installed Skype app to your device, tapping Skype username of the user will perform a Skype call to the user.