Rob wrote:

Interesting thought, however, my understanding is that the phone will continue to "talk" to cell towers when I'm not using it. In that case it would still be transmitting RF but not sound. I would think the RF detector would need to be able to discern between data and voice RF content.

Rob

Not necessarily. One of the nice parts about packetized voice is that it requires packets be sent on a period basis. Thus a phone that is sending/recieving packets from the cell network won't be transmitting as often as one that is involved in a phone call. Just hold your cell phone up to your cheap PC speakers for a demonstration. You're hearing rectified RF at that point, but you only process it as interference.

RE: Is it ok if I spy on myself?