Press and hold the GREEN button on the CK3000/DriveBlue unit for 2 seconds to redial last number called.
Dual call:
Upon hearing a 'beep' during conversation, press the GREEN button on the CK3000/DriveBlue. The active call is placed on hold while the waiting call is accepted.
Press the GREEN button again to alternate between calls.
Press the RED button on the CK3000/DriveBlue unit to reject the waiting call.
Private mode:
During the conversation, press the GREEN button on the CK3000/DriveBlue to toggle between handsfree and private mode. Private mode routes the conversation through the phone.
Known issues with this phone: No particular problem noted to this date.