Fractional provider NetJets has ordered 50 AirCell ST 3100 Iridium satellite communication systems for its fleet of Hawker 400XP light business jets. The satellite phones will be installed in the 400XPs before retail delivery at Raytheon Aircraft Services in San Antonio, in the coming months, according to AirCell, which began marketing Iridium services in 2002. NetJets competitor Flight Options has also added the ST 3100 phones to its fractional-share aircraft, which are popular with customers because of Iridium’s relatively low per-minute charges.