[verandaguys_alt]

As interesting as SIGINT against terrorist networks sounds, I assume most of this is classified -- since the cells are already known to operate smaller, and likely more difficult-to-intercept networks than nations, they'd probably adapt fairly quickly if it were revealed how they're being eavesdropped on.

[moftz]

I would imagine that since groups like ISIS aren't running their own cell networks, it would be very easy for government groups to locate anyone using those networks. Satellite phones can be just as easy to find too. The only way to really hide is just blend in with the normal cell noise of a city, use encrypted messaging, and hope no one is connecting the metadata dots to find you.

[kjs3]

Mexican drug cartels have been found to be running their own cell networks, so the idea that ISIS or any other well-funded group could do the same is not outside the realm of possibility. Of course, from a SIGINT perspective, cell towers are pretty hard to hide.