Samsung SGH-X426ZSAAWS - Manual (Page 17)

Your Phone 13
Earbud/Microphone
The included earbud/microphone allows you to use your
phone virtually hands-free.
To answer a call using the earbud, press the button on the
earbud controller.
To open the recent calls menu, press and hold the earbud
controller button. A beep indicates the menu is ready.
To re-dial the most recent caller, press and hold the
earbud controller until you’ve heard two beeps. After the
second beep, the phone dials the most recent caller.