Quote Originally Posted by sunlogo View Post

To fix 500m offset problem, change the settings of the gmsup.ini to China.
Also try upgrading from GMXT 5.0.00TW to 5.0.10TW
sorry to bother you with a question you have probabally heard 10,000 times, but i cant seem to find a more detailed solution on how to fix the gps offset problem in china.

how do you do change the settings of gmsup.ini?

I am using ppc garmin mobile xt and would like it to be accurate. thanks