PHDays 2012 - Abusing Calypso talk
Osmocom-BB team member Sylvain Munaut gave a talk at PHDays 2012 about abusing the calypso phones.
It mostly focus on the technical details of the DSP hacking that was done previously to use those phones as passive sniffer and demonstrates some more hacking to turn those phones into BTS.
The talk video is available here and the slides are available here
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