These smurf like tools are often used by major enterprises that own a private cellular network. They use these kind of technique to protect there properties or in case they need to spy on an employee. Your network provider can do much then Snowde did mentioned in that interview. The neo900 gives a user much more control over the device compared others. Turning off the modem does not necessarily hide your locations if you don't change your wlan mac address properly. I think that NSA was setup to be focused on security instead of spying on the boy/girl next door. Spying isn't something new but very old. Back at the time Adam used to spy on Eva in the holy garden. Does the Lilon cell backup battery of the N900 also supplies power to its cellular modem?