In this paper, we wish to alarm the community that the long realized risk of interoperation with the Internet is becoming a reality: Smart-phones,interoperable between the telecom networks and the Internet, are dangerous conduits for Internet security threats to reach the telecom infrastructure. The damage caused b ysubverted smart-phones could range from privacy violation and identity theft to emergency call center DDoS attacks and national crises. We also describe defense solution space including smart-phone hardening approaches, Internet-side defense, telecom-side defense, and coordination mechanisms that may be needed between the Internet and telecom networks. Much of this space is yet to be explored.
