So my device shows wrong speed. i think shows meter per sec. I make factory reset then i install gps test or any gps app.i bought sygic full version but no luck, speed showing wrong. if i drive about 10hm/h shows about 32km/h. But location shows in real time correct. I try upgrade firmware from philips support site and no luck.
error http://s16.postimg.org/cz1u90hvp/WP_..._01_27_Pro.jpg i try both http://www.isearch.philips.com/searc...ort&sid=header firmwares.
My device info http://s4.postimg.org/eomk28fel/WP_2..._12_31_Pro.jpg

Maybe is some nmea update to change speed units to km/h ?
sorry for my bad english.