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World Wide Number service is targeted at the inbound
roamers. It allows inbound roamers to use their local network service numbers
(e.g. customer service, voice mail and etc) in the service provider's network,
just like what they do in their home country. They do not need to use international
call prefix such as +, 001.
This service shall bring convenience
to the inbound roamers and therefore encourages them to select the service provider
network. Service provider gains from the international calls the roamer made. | 
