MTN South Africa has launched high definition voice services on parts of its network using the Adaptive Multi-Rate Wideband (AMR-WB) coding standard, Telecompaper.com reported on Aug 20, 2014. CTO Eben Albertyn said most modern smartphones support the technology, adding that to experience the benefits of HD Voice, both the caller and receiver must have compatible handsets. Currently, there are no HD voice calls on LTE, so this technology applies to 3G calls only, Albertyn said. He added that due to very limited handset support for AMR-WB on 2G calls, MTN has not activated HD Voice for 2G calls.