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The GSMA represents the interests of mobile operators worldwide. Spanning more than 220 countries, uniting the world's mobile operators and companies in the broader mobile ecosystem.

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HD Voice Minimum Requirements

HD Voice Annex C Minimum Requirements with GSM UMTS LTE - May 2013

HD Voice Annex D Minimum Requirements with CDMA2000 - May 2013

HD Voice Annex E Minimum Requirements with DECT - May 2013

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