I agree with CarpPoop on this fact......
The GPS refresh rate is supposed to be fixed in the 4.700 version software....
A unit with 4.700 version software preinstalled can be purchased...
Talk to the customer service representative at your retailer of choice and make sure you are getting a 2010 model with the 4.700 version software....
This can be verified by the serial number on the unit....


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