How to make conference call with Samsung galaxy S4 ?
A conference call is a telephone call in which the calling party wishes to have more than one called party listen in to the audio portion of the call.
To make a conference call on your Samsung Galaxy S4, you must follow these instructions:
1. While on a call, tap Add call.
2. Enter the 10-digit phone number and tap the Call button.
To dial a number from the contacts list, tap the Contacts tab.
Scroll to and tap the desired contact.
3. After the second call connects, tap Merge.
Then the conference call is now initiated. If you click the merge and it really does not work, you may try to go to any Samsung outlet or to where you bought your handset for them to check your handset.