1. RingFree Mobility Inc. © 2009 Mobile VoIP Eric Chamberlain Founder, RF.com eric@rf.com

2. RingFree Mobility Inc. © 2009 What is Mobile VoIP? VoIP calling to and from mobile devices Calling everywhere from anywhere sip:eric@rf.comeric@rf.com WiFi GSM

3. RingFree Mobility Inc. © 2009 Challenges Mobile carriers Varying network conditions Limited computing resources VoIP is complex Codecs

4. RingFree Mobility Inc. © 2009 Goals Easy to use Desk phone parity Any mobile phone/device Any VoIP provider or IP PBX Mobility

5. Confidential - RingFree Mobility Inc. © 2008 Global Technology Market Shares

6. RingFree Mobility Inc. © 2009 WiFi Good bandwidth for signaling Good bandwidth for media stream Limited coverage (~282,000 hotspots) No mobile signal Roaming is a challenge

7. RingFree Mobility Inc. © 2009 3G Good for VoIP signaling Ok for VoIP media stream Limited coverage

8. RingFree Mobility Inc. © 2009 EDGE Good for signaling Poor for media stream General coverage

9. RingFree Mobility Inc. © 2009 GPRS OK for signaling Bad for media stream Available where mobile signal is available

10. RingFree Mobility Inc. © 2009 Mobile devices Mobile Phones PDAs Smartphones

11. RingFree Mobility Inc. © 2009 What about a SIP stack? Stack sips your battery Not architected for mobility Most mobile devices dont have SIP stacks

12. RingFree Mobility Inc. © 2009 Alternative to SIP? HTTP/XMPP/SMS (signaling) Could even be WAP Call local POP (media stream) Minutes are cheap Voice channel was designed for voice Server converts call to SIP and completes

13. RingFree Mobility Inc. © 2009 Why does Mobile VoIP matter? 3.5+ billion subscribers 1,050 mobile networks 282,000+ WiFi hotspots

14. RingFree Mobility Inc. © 2009 Consumers 18% of U.S. households are mobile only Want mobility Want advanced features Dont want to buy, wait, and manage equipment

15. RingFree Mobility Inc. © 2009 IT managers Reduce costs Move international calls to VoIP Mobile workforce Advanced features outside the office

16. RingFree Mobility Inc. © 2009 VoIP Providers Customers dont have to be at home or work to use minutes Reduced hardware, provisioning, shipping, & RMA costs Up-sell advanced features

17. RingFree Mobility Inc. © 2009 How can you get started? Visit our site http://rf.com/http://rf.com Check with your VoIP provider A mobile SIP client may already be in your phone

18. RingFree Mobility Inc. © 2009 Questions Every VoIP provider should become a Mobile VoIP provider Every mobile phone should provision like a desk phone Consumers should get the same functionality Eric Chamberlain Founder, RF.com eric@rf.com