1. 13/02/20061 Roaming solutions for mobile operators in Latin America and the caribbean CANTO 2006 Punta Cana, 21.06.2006

2. 213/02/2006 Small is beautifull, but.. ? Is today’s bilateral roaming practice good for small Caribbean Operators

3. 313/02/2006 Small Caribbean Operators don’t have the economy of scale to establish worldwide bilateral roaming coverage Small GSM-operator: ~10-30 bilateral RoamingRelations Roaming Revenues Medium GSM-operator: ~30-150 bilateral RoamingRelations Big GSM-operator: ~150-400 bilateral RoamingRelations Gross Margin Gross Margin Roaming related costs Roaming related costs Roaming related costs

4. 413/02/2006 Comfone Key2roam – The Hub solution PMN A PMN B PMN C SignallingClearing Roaming Coordination Comfone Key2roam One agreement Reduced complexity Increased availability

5. 513/02/2006 Comfone wVoIP/GSM network solution GSM-VPMN Several operators in each country wVoIP-VPMN VoIP to GSM Global wVoIP Services Internet worldwide International Roaming Agreements Unilateral Roaming Agreement for wVoIP Subscriber‘s Home Public Mobile Network PMN Subscriber roaming in Comfone wVoIP network Subscriber roaming in 3rd party GSM network Subscriber GSM-HPMN Visited Public Mobile Network

6. 613/02/2006 Business Model Principles 1.Standard unilateral roaming relation between Comfone and Mobile Operator (no deviations) for signaling, SIM- authentication and clearing –Mobile Operator acting as HPMN –Comfone acting as VPMN 2.Single mobile number for the subscriber (end-user), regardless of whether the subscriber is using the GSM network or VoIP. 3. The end-user device will be a dual mode hand-set (wLAN- enabled smart phones) with easy-to-use wVoIP functionality.