The Juno T41 and the Yuma 2 both come with built in GPS with internal GPS programming. Juno T41 has a program called SatViewer and the Yuma 2 has one called Trimble GPS Info. There are settings in these programs to control what GPS data Strings are received. FW Mobile requires the NMEA data strings. Amoung those files we can receive the GGA, GLL, RMC and VTG. Hope this makes sense.