If the new generation of smartphone ransomware is combined with worm-like spreading capability akin to something like Wannacry, the result could be catastrophic. We will look at several examples of smartphone ransomware with demonstrations showing how the phone is infected, how the device is locked, what data is encrypted, how the ransom is paid and what can be done about it. The presentation will conclude with a discussion on the evolution of smartphone ransomware and how the technology could be leveraged to launch a major attack against the mobile network services by disabling a significant number of handsets.