Why can't I send and receive emails during phone calls ?

[AC Question]

Sometimes I have to view emails coming in and respond to them at the same time as I am on the phone.
It worked on my S5
But not on my note 5

What do I need to do, is there a setting ?

 

[James Rogers2]

Do you advanced calling activated?

 

[James Rogers2]

Do you have advanced calling activated?

 

[Kendahl Titcomb]

Are you on a GSM network and do you have the volte checked

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