Methods and systems are provided for integrating billing and services management systems across disparate telecommunications systems including wireless systems and local and long distance wireline systems. Wireless and wireline services may be charged to and billed under one periodic billing. A rollover management system is employed for managing units of call usage that may be "rolled over" from a present usage period to a subsequent usage period. An integrated services settlement system is provided which is operable for apportioning revenue associated with utilization of the wireless carrier's services to the wireless carrier and for apportioning revenue associated with the wireline carrier's services to the wireline carrier. An integrated telecommunications services ordering system is provided that is operable to synchronize subscriber orders between the subscriber's wireless and wireline carriers.