Tap on the ‘More’ icon to switch to the additional features set, and press the ‘Add call’ icon
More Icon
Add Call Icon
Choose а contact that you’d like to call from the list or tap the numpad icon to manuay dial a number.
i:Numbpad Icon
After you’ve connected with a new participant, press the ‘Merge’ button to add this participant to a conference.
i:Merge Icon
iOS
To add a participant to a call:
During an ongoing call, tap on the ‘Add call’ icon.
Add Call Icon
Choose а contact that you’d like to add to a call from the list OR press the numpad icon Choose а contact that you’d like to add to a call from the list.
Numpad Icon
After you’ve connected with a new participant, press the ‘Join’ button to this participant to a conference.
Press the ‘Merge’ button (1) to merge both lines into a conference.
You can repeat all the above steps to add more people to a conference call.