اگر صحبتهای بنده برای شما سندیت نداره ، این مطلب رو از سایت نوکیا براتون میذارم :
مثلا گوشی بنده که HTC هست ، داده های افمریز رو از سرور HTC میگیره (با نرم افزار Quick GPS ) و گوشی های نوکیا هم همین داده ها رو از سرور نوکیا دریافت میکنه . اون قسمتی که قرمز کردم رو دقت کنید.
Assisted GPS : A-GPS
Assisted GPS (A-GPS) is used to retrieve assistance data over a packet data connection, which assists in calculating the coordinates of your current location when your device is receiving signals from satellites.
When you activate A-GPS, your device receives useful satellite information from an assistance data server over the cellular network. With the help of assisted data, your device can obtain the GPS position faster.
Your device is preconfigured to use the Nokia A-GPS service, if no service provider-specific A-GPS settings are available. The assistance data is retrieved from the Nokia A-GPS service server only when needed.
You must have an internet access point defined in the device to retrieve assistance data from the Nokia A-GPS service over a packet data connection. To define an access point for A-GPS, select Menu > Applications > Location and Positioning > Positioning server >
Access point. A wireless LAN (WLAN) access point cannot be used for this service. Only a packet data internet access point can be used. Your device asks for the internet access point when GPS is used for the first time