Singaporean fixed and mobile operator StarHub says it has successfully completed the first voice-over-LTE (VoLTE) call based on the IR.92 global 3GPP VoLTE standard, in a live 4G network in Plaza Singapura. In a press release the carrier said that the landmark achievement comes after it attained island-wide street-level 4G coverage in October 2013 and nine months after it launched Singapore’s first HD voice over 3G service. To deliver VoLTE, the carrier has implemented an end-to-end platform from Nokia Solutions & Networks’ (NSN). StarHub has deployed NSN’s open TAS (Telecommunications Application Server) for voice, home subscriber server (HSS) and IP multimedia subsystem (IMS). VoLTE enables customers to make HD voice calls over a 4G network; by allowing more speech information to be sent, callers get more natural-sounding and significantly clearer phone conversations, with reduced background noise.