ISR Service Options and Key Considerations IRT Meeting

ISR Service Options and Key Considerations IRT Meeting Tampa Lokdeep Singh – lsingh@worldcell. com June 15 th, 20007

Agenda § § § ISR Solution components Implementation Options Key Implementation considerations World. Cell introductions Open Discussion

ISR Challenges & Solution Components § IIF – Compliance with J 038 B and 3 GPP 2 -CDMA-GPRS Roaming-X S 0034 standards § GSM roaming agreements § SIM/RUIM cards § Dual-mode handsets § Data clearing and settlement § Fraud prevention § Support for home services § Customer support for GSM/GPRS § GRX connectivity* Roaming IIF MMMF Handsets GRX Customer Care Clearing Fraud Managmnt SIM/ RUIM

ISR Implementation Options § CDMA carrier hosted - Build your own § IIF hosted by CDMA home carrier § GSM roaming provided by a GSM Sponsor or through its own interstandard roaming agreements § Secure SS 7 connectivity to GSM networks § Hosted IIF + GSM Sponsor § IIF hosted by a roaming service provider (RSB) § GSM roaming agreements through a third party sponsor network § SS 7 connectivity to GSM networks through the GSM Sponsor Network § Fully-hosted RSB § IIF hosted by a GSM carrier § GSM roaming agreements provided by the same Service provider § Service provider acts as a CDMA roaming partner to the CDMA home network

Solution #1: CDMA carrier-hosted - Build your own § § § IIF hosted by CDMA home carrier GSM roaming provided by a GSM Sponsor or through its own inter-standard roaming agreements Secure SS 7 connectivity to GSM networks CDMA hosted IIF CDMA Home NW IIF GSM Visited Network GSM Sponsor TAP 3 CIBER CDMA ARP TAP 3 DCH CDR Feed

Solution #2: “Hosted IIF + GSM Sponsor” § § § IIF hosted by a roaming service provider GSM roaming agreements through a third party sponsor network SS 7 connectivity to GSM networks through the GSM Sponsor Network Hosted IIF CDMA Home NW CIBER IIF CDMA ARP GSM Visited Network GSM Sponsor R CD ed Fe TAP 3 DCH

Solution #3: Fully Hosted Option § § § IIF hosted by a GSM carrier GSM roaming agreements provided by the same service provider Service provider acts as a CDMA roaming partner to the CDMA home network Fully Hosted ISR Service RSB as CDMA RP CDMA Home NW IIF RSB as GSM SP GSM Visited Network TAP 3 CDMA ARP CIBER TAP 3 DCH

ISR Implementation - Business Considerations Impact on existing CDMA roaming processes: § § Will roaming implementation process be different from CDMA-CDMA roaming? Daily Business processes different from CDMA roaming? Requirements for multiple agreements (roaming, billing/clearing, inter-operability SP)? Billing and clearing through your existing ARP? § § § CIBER records (Voice), CIBER 32/AAA (Data) or proprietary CDR file Multiple price points or customized zone-based billing? Net-settlement or Bilateral settlement? Currency USD or Euro/Local- Currency fluctuations? Responsibility for rejects? § Subscription fraud prevention mechanisms applicable to ISR in GSM mode? § White-label/customized offering? § Does this solution address your customer (Enterprise/Gov’t/consumer) requirements?

ISR Implementation - Technical Considerations Interoperability § § § Compliance with J 038 -B and 3 GPP 2 X S 0034 standard for CDMA-GPRS roaming Supplementary service support, service codes Handling of TLDN- MSRN mapping Voice Mail Deposit, Voice Mail Retrieval and Notification Solutions RUIM and IS 751 (Use of IMSI) support Inter-standard Data Solution § § SMS delivery solutions § § Support for MIP? GRX connectivity required? Leased lines or CRX connectivity? Does ISR provide increased SMS delivery footprint? SMS billing and clearing Dual IMSI support may be important to some carriers Maintenance and node recovery handling (URD-GSM MAP “Reset”)

ISR Implementation - Technical Considerations Service § § Impact on core network, existing processes, troubleshooting techniques etc. Troubleshooting and customer care process. § § Fraud Prevention Mechanisms § § HUR V/S CDMA Fraud NRT CDR exchange Product Roadmap § § § One step resolution is the key Visibility to GSM/CDMA traffic ( ANSI MAP, GSM MAP, AAA traffic) GSM sponsor and IIF provider integrated customer care? MEID, IS 751, NRTRDE support Traffic Redirection and Selective Roaming Restriction PRL management needed in GSM mode? GSM uses PLMN file that works very differently than PRL

ISR Implementation - Technical Considerations Handset § Frequency bands ( Quad Band/Tri-band) § Support for OTA in GSM mode § Support for USSD, MN file (Voice Mail #) § Shared files in both modes (Phone book/contacts) § RUIM Support by the handset § Network Selection behavior in GSM mode. Interaction with Traffic steering if implemented

World. Cell Fully-Hosted Solution Overview Fully-hosted ISR Solution is an IIF hosted by a GSM carrier, providing ALL components of the ISR service, while preserving the standard CDMA network interfaces, existing CDMA roaming processes, clearing and net-settlement principles

World. Cell Fully-Hosted Solution benefits § Business Considerations: § § § Technology Considerations § § Implementation and operations similar to CDMA roaming Single agreement, single point of connectivity Billing and clearing in CIBER. Net-settlement in US currency White-label offering Low CAPEX Full compliance with standards and additional custom features MIP for GPRS/EDGE roaming Support for home services, Optimal Voice Mail deposit Service Considerations § § § Centralized- fully hosted service One step problem resolution – Integrated IIF and GSM customer care Seamless roaming into GSM/GPRS

World. Cell Fully-Hosted Solution Overview- ISR

About World. Cell § Licensed GSM operator in Iceland § Viking Wireless § Roaming agreements: 291 Networks and 160 Countries § Roaming Service Bureau § Provides interoperability and roaming services to North American and international wireless operators § Converged platform that supports voice and data across multiple technologies including GSM, CDMA, Wi. Fi § Global Enterprise Managed Services § The leading provider of voice and data wireless services to the US Government outside the United States § § Provides enterprise security to mobile devices Mobile Mind (acquired 2005) § Smart CARD (SIM/USIM) and Mobile Application Development and Management § HQ in US with regional offices in Brazil, Germany, Japan and Iceland

ISR Service Options and Key Considerations IRT Meeting Tampa Lokdeep Singh – lsingh@worldcell. com June 15 th, 20007