Polish operator of the Plus network, Polkomtel has implemented Nokia Siemens Networks’ Circuit Switched FallBack (CSFB) solution to provid voice call services alongside LTE. CSFB seamlessly switches customers to Polkomtel’s 3G network to make voice calls when using LTE devices.

Poland's operators Polkomtel and Aero2 have selected Ericsson to supply WCDMA and LTE infrastructure for their network. Under the agreement, Ericsson will also provide a range of services including design, deployment, integration and support for the upgraded mobile broadband network for a period of three years.