Polkomtel, the Polish operator of the Plus network, has partnered with Nokia Networks to launch Poland’s first public trial of its Wi-Fi Calling+ service. The service lets users make regular calls when connected by Wi-Fi in locations with poor mobile coverage. The common voice core for VoWiFi and voice over LTE (VoLTE) enables a smooth evolution of enhanced voice services going forward.

The service uses Nokia’s voice core technology, including its IP Multimedia Subsystem (IMS), Open TAS (Telecommunications Application Server) and Border Gateway (BGW), along with a fully customized end-user application from OptiMobile.