A wireless mobile communication terminal and method that can check a service area using GPS are provided. The wireless communication terminal using a position detection system and a wireless communication system having at least one connection node for providing a network connection service to a plurality of wireless communication terminals includes a communication module, a position detection module, and a network connection module which includes a service map specifying the availability of communication in an area determined according to a state of radio waves that have arrived from the connection node. The network connection module manages network connection using the position information about the wireless communication terminal and the service map. Therefore, the wireless communication terminal can determine if its current position is in an available WiBro service area using the GPS and WiBro service map information, thereby preventing power consumption due to unnecessary connection attempt in the unavailable service area.