This document discusses various use cases and analyses for a telecom company, including subscription activation and termination, CRM and billing, revenue segmentation by service and customer, customer churn analysis and reasons for churn, customer profiling, calculating average revenue per user (ARPU) and the shift to average revenue per account (ARPA), segmentation of postpaid and prepaid customers, analyzing tariff plan changes, and how customer segmentation can benefit operators by maximizing revenue and retention.