Samsung SCH-R860ZKAMTR - Manual (Page 21)

Understanding Your Phone 18
Caution!: Keep the phone away from you ear while in Speakerphone Mode.
(For more information, refer to “Responsible Listening” on
page 155.)
To exit Speaker Mode:
ᮣ During a call using Speakerphone mode, press the Speaker
on key (
). The Speaker on icon changes color to black
and the other party cannot be heard through the speaker.