Annoying enough that my location is recorded when I call. Intolerable that I am tracked even when my phone is off, and nearby conversations can be overheard. http://news.cnet.com/2100-1029_3-6140191.html Phone pouches with a liner that blocks signal when phone is inside is a standard commerecial product; $3-$6 China mail order (really work?), $hundreds domestic high-end. There was mention of DIY here in a recent Privacy General thread, but topic incomplete: >NSA has direct access to tech giants' systems for user data, secret files reveal (Multi-page thread . Last Page)< Any definitive on-line info on this? Credible DIY? My quick search found fragments so far.