With a normal Spy Phone you can only Log into the phone when the target isn't using the phone (stand-by mode). So when he/she is making a phone call you will only get the busy signal and wont be able to spy on the target.

With the Cell Phone Interceptor you can call and listen into surrounding sounds (around the Cell Phone Interceptor) when the target is not using the Cell phone Interceptor and also listen to "live" conversations (taking place on the Cell Phone Interceptor) when they are making a phone call. One channel, one phone, one line. You may program into the phone either a Cell Phone or land line (one number only) number and call into the Cell Phone Interceptor for monitoring. This single number can be quickly and easily changed. You can call into the Cell Phone Interceptor from anywhere in the world.

There will be no record of calls received from the special access number in the phone's list of received calls.

The Listening Mode will be immediately interrupted if:

1. The Cell Phone Interceptor receives a call or

2. If any key of the Cell Phone Interceptor is pressed.

Therefore, the interruption of the Listening Mode often means that there is an incoming or outgoing call from or to the Cell Phone Interceptor. Just call the Cell Phone Interceptor from the special access number again and start listening to the conversation.