The CALLconference feature enables Vodafone customers with conference call capable mobile handsets to have up to eight participants on the one call.
The originator of the conference call must be present at all times in the call. If the originator of the conference call wishes to exit, the conference call will end for all other parties.
"How Do I Initiate a Conference Call?"
You can activate and de-activate CALLconference online:
Click here to log in to My Vodafone
Navigate to "My Phone"
Click "Call Options"
Select the appropriate "Call Conferences" option from the drop down box and
Click "Save Changes"