What is a Spy Phone?
A spy phone is a normal mobile phone that can be called and it silently activates itself. The caller can then hear what happens in the vicinity of the phone.
The spy phone offered in France is an unlocked Nokia 3310 GSM mobile phone, apparently it will not work on US networks. This phone sells for 399 Euros.
What can you do with it?
For instance the spy phone owner can leave the phone on the table when leaving a meeting for a rest room break. He then calls the spy phone and listens to the ongoing conversation. On return the owners negotiating positions may change dramatically.
Another use is to spy on your partner by "forgetting the phone at home".
I wonder when those spy phones will utilize the camera in phones to also get spy video.
Spy-Phone.net also offers a modified Nokia 6100 that is even more evil as it is designed to be given to a person. The phone looks totally normal, but can also be called via a secret number hidden in the phone. This one sells for 699 Euros.
Although I exchanged emails with the French Spy-Phone.net guys, I cannot guarantee if this is a legit product or company, buy at your own risk. Also spying on people is illegal in many countries.