Quote from: Shroomeister on August 14, 2012, 11:38 pmOP - good post!I have a question though - not that I expect you to know the answer.But if someone has a prepaid phone - the only way "they" would know to track it is if they had the number or got their hands on the phone physically. right?If I had a brand new prepaid phone right now and start calling a mexican cartel to arrange a deal. how would they ever know that "THAT" phone is the one to track?ya follow?It's just a hypothesis, but I would suspect the telecoms company's profile cellphone usage, method of acquisition etc. Obviously there's severe limits to this, but if you were constantly buying prepaids at the same time each week, or using them in the exact same place all the time, and more especially if you're communicating to already 'spotted' suspect numbers, then yes, such traffic analysis could be a problem. This is why it's better to get people up to speed on email, and then use PGP and anonymously communicate via the Interweb via services like Tor. There is seldom a good reason to need to be in constant contact with other members and also require mobility within an operation unless you are disorganized. Anybody who requires constant feedback as to where they ought to be and what they should be doing is a liability in any organization, let alone a black market one.Communicating with customers is a different thing, but that can also be alleviated if you think laterally, we had a thread on the subject recently ("best phone for drug dealer" or something similar).