U-Map is a highly accurate global positioning service China Unicom offers to the public on its CDMA 1X network with the help of cutting-edge U-Map technology. The positioning error can be as small as 5-50 meter in outdoor environment. U-Map service is available both indoor and outdoor as long as the place is covered by CDMA 1X network. This also shortens the time needed for positioning.

Unicom's U-Map service provides users with rich location information services based on mobile terminal positioning and integrating GIS map data. Location information services available can be classified into horizontal market applications targeted at popular market and vertical market applications targeted at industry users.

Horizontal market applications mainly include user positioning, mutual positioning, location-based information service such as living, transport, entertainment, service and public facilities nearby, and location-based entertainment games. Vertical market applications integrate mobile positioning with industry applications to provide industry-specific services like rescue positioning, attendance service, vehicle management, logistics management, location ads and corporate internal management.