Kris Rinne, vice president of American telecom operator AT & T, revealed at an industry conference recently that AT & T will introduce HD-Voice (high-definition voice) calling service this year.
It is reported that AT & T's high-definition voice service may be launched at the end of this year. Prior to this, the US mobile operator T-Mobile announced that it will implement a high-definition voice service nationwide, and all of its iPhone 5 that will be sold in mid-April will use this technology. Although the mobile operator Sprint implemented HD voice service earlier than T-Mobile, its iPhone 5 has not yet provided this service.
The high-definition voice call network requires both parties to support this service in order to achieve this, so the market promotion is relatively slow.
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