Samsung SPH-N400 - Manual (Page 99)

Section 3: Using PCS Service Features
3B: PCS Vision 98
To set up a private chat room:
1. Press and highlight 1-->1. Press
2. Press the navigation key up or down to highlight the available
chatters in the room and press
.
3. Press to highlight OK and press .
4. Confirm connection with other user.
5. Enter messages using the keypad.
Note: You can also download and use a Java-based chat client on your
PCS Phone.