Additional benefits:
To make a conference call, check your handset manual to ensure that your handset supports the conference call feature. Ensure that "Call Waiting and Call Hold" is activated. Then follow these steps:

1. Call the first person and put them on hold, then call the second person and put them on hold, and so on.
2. When all participants are on hold, activate the conference call by choosing Merge Calls.
3. Any person who calls while you're in a conference call can be added to it.

Additional benefits:
You're charged at the respective call rate for each person you call to join the conference call (if you call 5 persons into the conference call, you'll pay for 5 calls). Each person who calls you to join the conference is charged at his/her respective rate.

Price:
Free