as posted in thread:
http://aximsite.com/boards/showthrea...threadid=22569
i'm trying to accomplish the same thing right now. my girlfriend has a nextel i88s and i just purchased one myself (eBay @ $69). i have used the standard serial cable available from nextel to connect from the phone to my sony vaio laptop and it worked like a charm! the phones menu gives you the ability to turn NMEA output on or off. NMEA is a standard communication technology for GPS. most software reads NMEA. with the NMEA standard output turned on, the computer receives the necessary signal and tracks it on the software. I successfully used it with microsoft streets/trips, as well as a few others that i tinkered with.
the accuracy for the phone itself when standing still will give a fix of accuracy down to 25 feet. i wasn't sure how well i could trust the details it was giving me until i took a few random readings with the phone and a high dollar garmin unit that my police department uses (good friends of mine). i was pleased to find the similarity between readings from the non-waas enabled phone to the waas enabled garmin - the readings were 95% the same! even when moving the unit was still fairly accurate. cruising at about 75 mph with both units, the i88 connected to the computer and watching the garmin's own display - the readings stayed together though the refresh rate at such speed left a tiny bit to be desired on the i88. still not bad at all when you consider its a CELLPHONE!!
now, getting the phone connected to the axim x5 may be a different story, but i'm gonna try it. thinking about going with the gomadic cables everyone speaks so highly of. if anyone is interested - i'll try to post my findings on here after i get everything in and try it out!