Why did the 3 way call option disappear from my S5 after the update today?

[AC Question]

I have to have that option for my business.

 

[B. Diddy]

Welcome to Android Central! What update are you referring to? Was it a system update or an update to the Phone app?

When you're in a call, is there an Add Call button (or a button that looks like a person with a + sign)?