I won't speculate on eavesdropping since I haven't tested this, but what I hear when I heard his method is more of the security risk that he could possibly be pinpointed. A red flag would go up for me, hearing multiple people (the lawyers) clustering to one location.
Smartphones are a beacon of constant info...GPS and signal pinging can get your coordinates (at least general area), and Wifi can triangulate the position [0]. Cameras and microphones are just icing and still require a device to be compromised, whereas signals, require carrier network access...which is what PRISM revealed [1].
Smartphones are a beacon of constant info...GPS and signal pinging can get your coordinates (at least general area), and Wifi can triangulate the position [0]. Cameras and microphones are just icing and still require a device to be compromised, whereas signals, require carrier network access...which is what PRISM revealed [1].
[0] http://thenextweb.com/apple/2013/03/26/what-exactly-wifislam...
[1] http://news.cnet.com/8301-1009_3-57589100-83/nsa-whistleblow...