GPS Not Activate in my iPhone 3G 2.1 Firmware

hello evrybody i Need help here
I bought an iPhone 3G firmware 2.1
in my country the mobile network(Vodafone Egyot) they sellin the iphone 3G with no GPS so its gives me when i press locate me a circle with no blue point!!.. i asked the customer service if they remove the gps ship from the iphone they told me that NO its just colsed on the firmware that sellin with frimware 2.1..
so is there any solution to activate the gps on my iphone 3G??