Nokia launched an Assisted GPS (A-GPS) service that helps Nokia Maps users find their current locations faster and get to their desired locations quicker using their Nokia mobile device with built-in GPS. 
The A-GPS service has the ability to reduce the time a connected mobile device with built in GPS needs to find its current position, known as time to first fix (TTFF) for most geographical locations worldwide. The service operates in tandem with a technical framework that allows third parties, such as service providers, to provide their own regional A-GPS services, making fix times even faster in certain areas-http://www.nokia.com/maps