Rev. 2 Wireless Local Number Portability and Pooling Phase 2 Implementation Guideline INDUSTRY 2002 SERVICE PROVIDER JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC CRITICAL NETWORK ELEMENTS AVAILABLE 03/02 All OTHER VENDOR PRODUCTS 05/02 NPAC AGREEMENT COMPLETE 07/02 INTERNAL DEVELOPMENT & TESTING for PORTING and POOLING * 08/02 8/1/2019 NOTE: ALL DATES ARE THE BEGINNING OF THE MONTH * refer to the North American Numbering Council Wireless Number Portability Operations Risk Assessment Report: Launching Wireless Pooling or Porting without Ubiquitous Separation of the MIN and MDN

Rev. 2 Wireless Local Number Portability and Pooling Phase 2 Implementation Guideline INDUSTRY 2002 (con’t) SERVICE PROVIDER JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC INTER-CARRIER TEST LOGISTICS 10/02 INTERCARRIER TESTING 04/02 10/02 DEPLOYMENT and FINAL ADJUSTMENTS 09/02 * 11/24/2002 8/1/2019 NOTE: ALL DATES ARE THE BEGINNING OF THE MONTH