How do I make a 3 way call on my S6?

[AC Question]

I would like to know how to make a 3 way call on my Samsung Galaxy S6. Please help.

 

[B. Diddy]

Welcome to Android Central! Which carrier? Here are the steps for the Sprint version, which are probably the same for other versions (although I'm not 100% certain): Make a conference call - Samsung Galaxy S® 6 32GB