HD voice is picking up steam, with 61 mobile networks having launched the service worldwide, according to the GSA.
Live mobile HD voice deployments now span 45 countries, GSA said. The number of networks supporting the technology has increased 55% in the past year, according to the industry body's statistics.
Adoption among consumers is also increasing, with some operators reporting an up to tenfold increase in the number of HD voice calls on their networks compared to a year ago.
By October 2012, 127 mobile phones from 14 manufacturers supported HD voice.
There are currently 12 markets - Austria, Canada, Croatia, Denmark, France, Poland, Russia, Slovenia, South Korea, Switzerland, Turkey and UK – where HD voice is offered by at least two competing mobile operators.
As adoption increases, GSA said it expects cross-network HD voice calls – both domestic and international – to become more common in 2013.
The full list of countries where HD voice has been launched includes: Armenia, Australia, Austria, Belgium, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Dominican Republic, Egypt, France, Germany, Hong Kong, India, Indonesia, Ireland, Israel, Italy, Jordan, Kenya, Luxembourg, Malaysia, Mauritius, Moldova, Netherlands, Nigeria, Philippines, Poland, Portugal, Qatar, Réunion, Romania, Russia, Serbia, Slovenia, South Korea, Spain, Switzerland, Thailand, Turkey, UAE, Uganda, UK, and the USA.