I think this is what you are looking for. http://grugq.github.io/blog/2013/06/13/ignorance-is-strength/ http://grugq.github.io/blog/2013/06/13/ignorance-is-stre

I think this is what you are looking for. http://grugq.github.io/blog/2013/06/13/ignorance-is-strength/ http://grugq.github.io/blog/2013/06/13/ignorance-is-strength... As for how to use the phone to avoid attracting attention, the typical technique is to use payphones on one end and the regular phone on the other. There are details here: http://grugq.tumblr.com/post/61946725012/hizb-allah-resurrected-the-party-of-god-s-return-to http://grugq.tumblr.com/post/61946725012/hizb-allah-resurrec... The open codes that get used to avoid detection, at least historically (modern usage seems to be even more restricted) are examined here: http://grugq.tumblr.com/post/60890158036/al-qaedas-codes http://grugq.tumblr.com/post/60890158036/al-qaedas-codes And here is an analysis of a modern clandestine organisation that used mobile phones for communication: http://grugq.github.io/blog/2013/10/07/drug-delivery-service-opsec/ http://grugq.github.io/blog/2013/10/07/drug-delivery-service...