Wireless Local Number Portability Timeline - Phase 2 INDUSTRY SERVICE PROVIDER 2001 - 2002 OCT NOV DEC JAN FEB MAR APR VENDOR PRODUCTS AVAILABLE 12/01 FUNCTIONAL SPECS COMPLETE 01/02 INTERNAL END-TO-END TESTING - NETWORK and BACK OFFICE SYSTEM DEVELOPMENT: Back Office ; Network - MIN / MDN Separation, Service Interoperability 2/02 4/02 NPAC TURN-UP TESTING INTER-CARRIER TEST COORDINATION AND LOGISTICS 10/01 4/02 8/3/2019 NOTE: ALL DATES ARE THE BEGINNING OF THE MONTH

Wireless Local Number Portability Timeline - Phase 2 INDUSTRY SERVICE PROVIDER 2002 (con’t) APR MAY JUN JUL AUG SEP OCT NOV DEC INTERCARRIER TESTING 09/15/02 4/02 DEPLOYMENT 9/02 10/15/02 FINAL ADJUST- MENTS * 11/24/2002 8/3/2019 NOTE: ALL DATES ARE THE BEGINNING OF THE MONTH