Singaporean operator Singtel plans to launch the city-state’s first full commercial voice-over-Wi-Fi (VoWiFi) service in August 2016, following successful HetNet (i.e. heterogeneous network) trials carried out in conjunction with Infocomm Development Authority of Singapore (IDA). HetNet is the umbrella term for Singapore’s nascent advanced mobile communications network, which is a combination of different cell types and different access technologies. Singtel and IDA have confirmed that it has successfully sent voice calls and texts over Wi-Fi in areas typically challenging for traditional mobile signals. In essence, HetNet enables continuity of service to be maintained via a smartphone device by hopping on-off the strongest cellular or Wi-Fi network, without requiring a third-party app to handle the call deep inside buildings or on the highest levels of skyscrapers. Further, Singtel confirmed that the HetNet trials demonstrate its readiness to support Internet of Things (IoT) connectivity in future.