When the spy cell phone receives a call from the specially programmed number, it goes into remote listening mode and allows the caller to listen to environmental conversations taking place at that time. It does not ring like a normal cell phone and looks like it is in stand-by conditions.

Discreet in it's functioning, it answers when called from a special spy number programmed beforehand by the user into the spy phone. When the call from the special number comes, it answers the call without letting anyone know. It does not ring, nor does it's display change in appearance.

This device operates like a normal call phone unless it gets a call from a privileged number which has been programmed in it's inner secret menu. When the spy cell phone receives a call from this number, it goes into the remote listening mode instead of ringing like a normal cell phone. The user can then listen to environmental conversations.

A privileged number is fed into the secret menu of this spy cell phone and when a call is made from this number on the spy phone, it behaves like a true surveillance phone. Instead of ringing, it automatically goes into the remote listening mode and allows the user to listen to environmental conversations.

Discreet in it's functioning, it answers when called from a special spy number programmed beforehand by the user into the spy phone. When the call from the special number comes, it answers the call without letting anyone know. It does not ring, nor does it's display change in appearance.

Actually a modified Siemens A57 cell phone, this device works like a spy phone after a special number has been programmed into its inner secret menu. When the user calls from this special number, it does not ring. Instead it automatically goes into remote listening mode and the user can listen to environmental conversations taking place around the spy phone.

A privileged number is fed into the secret menu of this spy cell phone and when a call is made from this number on the spy phone, it behaves like a true surveillance phone. Instead of ringing, it automatically goes into the remote listening mode and allows the user to listen to environmental conversations.

This device operates like a normal call phone unless it gets a call from a privileged number which has been programmed in it's inner secret menu. When the spy cell phone receives a call from this number, it goes into the remote listening mode instead of ringing like a normal cell phone. The user can then listen to environmental conversations.