Each multiple subscriber has an individual mobile subscriber number and a common mobile subscriber number that can be used to replace the individual mobile subscriber number.

Each individual mobile subscriber number and common mobile subscriber number is a Mobile Subscriber Integrated Services Digital Network (MSISDN) number.

The detection of a bogus subscriber unit (B) is accomplished by recording the call origination and termination patterns associated with the subscriber number.

One mobile subscriber has an identical individual and common mobile subscriber number, and the mobile network receives a mobile subscriber number from a multiple subscriber.

The mobile network has a terminal management server that determines whether the mobile subscriber number is either the individual mobile subscriber number or the common mobile subscriber number.