Communication device for placing calls within a plurality of wireless communication networks

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In one aspect, the present invention relates to a communication device that initiates calls within a plurality of wireless communication networks.
The communication device includes a storage device that stores one or more call numbers that are used for making calls.
The storage device also stores one or more corresponding calling codes associated with using each call number for making calls in other communication networks.
One communication network may be the subscribers home network, whereas the other communication networks maybe one of a number of visiting networks.
For example, if the communication device uses a local call number to place calls within a local service area served by the home network, all other calling codes, such as areas codes and/or country codes, that are needed for making the call in the visiting communication networks are also stored in the storage device.
The communication device also includes a receiver that receives a calling code requirement from an active network.
The active network is the network within which the call is placed by the communication device.
In other word, the active network is the network within which the communication devices operates.
When dialing a call number, the receiver receives from the active network calling code requirement information relating to whether the call is a local, long distance or international call.
As such, the calling codes may be associated with a corresponding service area that is covered by a communication network.
Based on the calling code requirement, a call dialer dials the call using the call number or the call number in combination with required calling codes.
If changed, the calling codes stored in the storage device may be updated based on updated calling code requirements received from the communication networks.
In accordance with some of the more detailed features of the present invention, the communication device also includes a transmitter that transmits a request for the calling codes from a network