• One Signal Enhancer Antenna Booster is shipped absolutely FREE along with every order placed during this week only.
• All you have to do is place an order (no matter how big or small), and we will include this antenna booster with your shipment absolutely free. For extra quantities you may place an order below.
• Signal Enhancer Internal Antenna for cell-phones and cellular phones. Decal type passive antenna without RF connector.
• If installed properly, this signal enhancer attempts to catch stray radiation in the body of the phone and re-rediates it to strengthen overall signal quality.

If you have no signal to begin with it will not work. It won't matter if you add a 10 foot antenna to your phone. If you have no signal to boost it won't happen. But if you have at least 1/2 bar of signal then it should boost it another 1/2 to 1 bar. I have read another review that tried it with 2 boosters and got even better results - I am going to try that.

I attached this to a Treo 650 on the Cingular Network. No additional signal in my home. Save your money.