Now that I have 4.4.4 I've read that it comes with HD Voice. Is this something I can turn on and off from my phone or is it a pay service that I must set up with my carrier?
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Now that I have 4.4.4 I've read that it comes with HD Voice. Is this something I can turn on and off from my phone or is it a pay service that I must set up with my carrier?
Here is Sprint's FAQ's for their HD voice calling.
FAQs about HD Voice from Sprint