Vodafone Australia has added a high-definition call service called HD Voice on its 3G network.
The free service is made possible using technology known as Wideband Adaptive Multi-Rate coding (WB-AMR).
According to Vodafone chief network officer Benoit Hanssen, the wider dynamic range means over twice the range of voice frequencies are transmitted allowing customers to hear the full range of a person's voice and makes it clearer to distinguish between similar sounds like 'S' and 'F'
"This is another step in our aim to improve our network and offer the best value mobile services in the country," he said in a statement.
HD voice calls will require the caller and receiver to be using compatible handsets on the Vodafone mobile network. Compatible devices include the iPhone5, Galaxy S4, Sony Xperia Z and Nokia Lumia.
Sign up for CIO Asia eNewsletters.