Syntax
         
            boolean 
            equals
            (
            Object 
            o
            )
         
      
      Parameters
         
            - 
               o – 
               the Object to compare with
            
 
         
       
      Returns
         true if o is a PhoneNumber representing the same MSISDN
      Usage
         Indicates if another object is
         
            equal to
         
         this one.
         
            true if o is a PhoneNumber representing the same MSISDN