Follow below steps to make conference calls :

• 1. Call the first person.

• 2. Once the call is established, press the Menu button.

• 3. Tap Add call.

• 4. The dialpad appears. Establish a call with the second person.

• 5. Once the call is established, press Menu.

• 6. Select Merge calls.

• 7. Both parties should be on the line now. The Conference call screen will appear.

• Repeat steps 2 through 7 to add more people to the call.