Question: What happens to the CFNRc service when a successful erasure request is made by the served mobile subscriber without specifying a BasicServiceCode?
Option 1: The CFNRc service will be partially erased for only voice services.
Option 2: The CFNRc service will remain active but in a deactivated state.
Option 3: An error indication will be returned to the subscriber as BasicServiceCode is mandatory.
Option 4: The CFNRc service will be erased (and automatically deactivated) for all basic services.
Explanation: According to the specifications, if the erasure request from a mobile subscriber does not include a BasicServiceCode, the erasure applies to all basic services. Upon successful erasure, the CFNRc service is not only erased but also automatically deactivated for all these services, with the network possibly sending an empty return result to the MS to confirm this.