Tap in the action bar to open the slide-out navigation, then tap People.
Tap in the action bar to open the Add Contacts dialog.
In the Search box, enter the name, part of the name, or the email address of the person you want to add.
In the results list, select the person you want to add.
Tap Add.
You can also add contacts directly from the list of followers on the People page:
Tap in the action bar to open the slide-out navigation, then tap People.
Tap in the action bar to display the view menu, then tap Followers.
Tap next to the person, then tap Add to Contacts.
To remove a contact: