Samsung SPH-N400 - Manual (Page 28)

Section 2: Understanding Your Phone
2A: Your PCS Phone - The Basics 27
Using the Speaker Phone
Your phone has a speaker phone option that allows you to carry on a
conversation without having the phone next to your ear. The speaker is
located on the back of the phone. When the speaker phone is on, the
volume can be controlled using the volume keys located on the side of
the phone.
To use the speaker phone:
1. Dial the desired phone number and wait for “Connected” to display
on the phone.
2. Press the speaker phone button located on the side of the phone. A
message is displayed that says “
Speaker Phone On ”.