Samsung SPH-L900TSASPR - Manual (Page 165)

Accounts and Messaging 151
4. If prompted, configure the Sync contacts parameter (Sync contacts or Don’t sync) and
tap Continue.
 If you are signed into more than one Google account, select the account you would
like to use with Google+. (Messenger is a component of Google+.)
5. Follow any onscreen setup instructions.
6. At the Messenger screen, tap to start a new message.
7. In the upper text field, enter a name, email address, or circle.
8. In the bottom message field, enter a message and then tap .
9. From the Messenger screen, tap > Help for more detailed information.