Slovenia’s second largest mobile operator by subscribers, Si.Mobil, has launched its own 3.5G W-CDMA/HSDPA network, which allows data transfers at a theoretical maximum speed of 3.6Mbps, Slovene Press Agency reports. The cellco has rolled out 97 UMTS/HSDPA operational base stations, covering around 25% of the population. Si.Mobil, which won a 3G licence last September for EUR6.5 million (USD8 million), plans to invest EUR50 million in the network in the first five years of operation, chief technology officer Walter Goldenits said. It also plans to expand its 2.75G network coverage and urban capacity by installing 76 additional GSM/GPRS/EDGE base stations, according to chief executive Dejan Turk. Si.Mobil joins wireless market leader Mobitel in the 3G market, whilst domestic broadband operator T-2, which bought an UMTS licence alongside Si.Mobil, has yet to launch services.