Singapore's mobile operator SingTel has unveiled 4G ClearVoice, a commercial full-featured Voice over LTE (VoLTE) service, in collaboration with Samsung and Ericsson. Operator's VoLTE service offers full suite of telephony features such as call waiting and forwarding on the 4G network.

From 31 May, 4G ClearVoice will be available to SingTel 4G postpaid customers at no additional cost. Talktime will be deducted from the monthly bundled voice minutes of their existing subscription plan.

According to operator, key benefit of the service is the ability to connect calls in less than two seconds. In addition, 4G ClearVoice is equipped with Single Radio Voice Call Continuity (SRVCC) capability, which automatically switches ongoing calls without interruption to the 3G network if users lose connection to the 4G network.

SingTel customers who use the Samsung GALAXY Note 3 will be the first to have 4G Clear Voice. A software update is needed to allow the handset to support VoLTE calls. New GALAXY Note 3 handsets sold from 31 May will come with the update installed. The update will be progressively sent to existing GALAXY Note 3 users over-the-air between 31 May and the end of June. Users of other 4G handsets can also expect to receive the update in the coming months.