Using Call Functions - Samsung HF4000 User Manual

Ensure the phone you wish to connect to is within range of the hands-
free car kit. Place the hands-free car kit and phone close to each other
to avoic pairing with other devices.
The Bluetooth phone you want to connect with must not be paired with
other devices. If the phone is already connected to another device, end
the connection and restart the Active pairing feature.
This feature may be unavailable depending on the some PDAs.

Using call functions

Available call functions may vary depending on the phone.
For better sound quality during a call, avoid covering the
secondary microphone.
Making a call
Redialing the last Number
Press and hold the Talk button to redial the last number of the most recently
conneted phone. You can also use the Voice command "Redial."
Press the Talk button twice to redial the last number of the second phone. You
can also use the Voice command "Redial Two"