Q: excuse me, can i use for FaceTime celling a three conference at the same time?

Hello, i provided my the iPhone information to you, such as looking for my iPhone 6 128GB memories storage and operation software systems was be up to date IOS8.4.1 versions.How can i make its solution for my FaceTime use a three conference at the same times? I'm not sure about is this version whether can to set up for my currently versions.I hope you must to be reply my the questions quickly, thanks!