A method and system for provisioning authorization for use of a service in a
communications
network. In response to a dialed feature code by a subscriber, a network entity
may modify the subscriber's profile maintained by a serving system to authorize
use of a service by the subscriber as indicated by the feature code. Alternatively,
the subscriber's profile may be modified to prohibit use of the service as instructed
by the dialed feature code. Therefore, the subscriber may effectively subscribe
to or unsubscribe from a service in this manner by dialing a feature code.