IOGear GBE201 - Manual (Page 24)

Redial a number
If you wish to redial the last number using the Bluetooth headset,
please follow the procedure below:
1.
Press and hold any of the volume buttons (volume up or volume
down) for approximately 3-5 seconds.
Note: If your phone has not previously used the headset, this may take longer
as the phone will ask for confirmation to use the Bluetooth headset
2. Your cell phone will start redialing the last number
How to Use Headset
20