Call+ greyed out

[Antusmar]

Hi. I have an S8 running Android 7.0. When I make a call the "Call+" button is always greyed out. I tested using an iPhone on the same cellular network and plan and this option works. Tried to search everywhere but can't find a solution (besides disabling easy mode which is not enabled). Any ideas please?

Thanks

 

[B. Diddy]

Welcome to Android Central! Are you talking about Sprint's Calling PLUS feature? If so, then did you get your S8 directly from Sprint, or unlocked from somewhere else? If it's not from Sprint, a feature like that might not work.

Or are you talking about the Add Call button to have a conference call?

 

[Antusmar]

Hi. Thanks. I am referring to the conference call feature

 

[B. Diddy]

Maybe it's a screen overlay issue? Screen overlays can sometimes interfere with certain oncscreen buttons. https://www.androidcentral.com/how-turn-screen-overlay-samsung-galaxy-s8