I dont understand how to turn on HD voice on the iPhone 6s Plus on the Sprint Network. I go under cellular but the option is not there to turn it on. Can someone please help me? I'm on iOS 10.
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HD voice isnt something you can turn off and on. its either on the tower youre connected to or its not.
i dont have an apple device but on my android when i make a call or receive one if im connected to a HD tower for the call a small HD pops up somewhere on the screen. usually most wont notice it unless youre on a call using the speaker phone and just happen to start looking at the contact/call on the screen.