The iPhone 8 and the iPhone 8 Plus include support for the Enhanced Voice Services (EVS) audio codec that offers improved voice quality and better call reliability, KDDI president Takashi Tanaka told Engadget Japan in a recent interview.
EVS is the first codec that offers up to 20 kHz audio bandwidth for higher quality audio, higher frame/packet error resilience, and higher compression efficiency than other speech codecs for a better user experience.
In the United States, T-Mobile supports Enhanced Voice Services and has offered EVS since early 2016. According to T-Mobile, EVS on its network offers improved voice call reliability in areas of weaker signal for fewer dropped calls and higher-fidelity calls for more realistic voice audio.
AT&T, Sprint, and Verizon have not yet announced support for EVS.
Apple does not mention support for the feature in its iPhone 8 documentation, but UK carrier EE also recently confirmed that the iPhone 8 and 8 Plus work with EVS in a press release announcing EVS support on its network.
Along with T-Mobile and EE, several other carriers in Europe and Asia also support EVS, including Vodafone Germany and NTT DoCoMo.
EVS is the first codec that offers up to 20 kHz audio bandwidth for higher quality audio, higher frame/packet error resilience, and higher compression efficiency than other speech codecs for a better user experience.
In the United States, T-Mobile supports Enhanced Voice Services and has offered EVS since early 2016. According to T-Mobile, EVS on its network offers improved voice call reliability in areas of weaker signal for fewer dropped calls and higher-fidelity calls for more realistic voice audio.
AT&T, Sprint, and Verizon have not yet announced support for EVS.
Apple does not mention support for the feature in its iPhone 8 documentation, but UK carrier EE also recently confirmed that the iPhone 8 and 8 Plus work with EVS in a press release announcing EVS support on its network.
Along with T-Mobile and EE, several other carriers in Europe and Asia also support EVS, including Vodafone Germany and NTT DoCoMo.
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