MD,
It's an amplifier that works on the lower portion of the cell frequencies. If it was the newer style that was GMRS compatable it would be better as it would amplify on all the working transmit frequencies. The other aspect, of receive amplification, shows some pretty poor noise characteristics. The signal to noise ratio specifications are not very good. You want high gain but, a lower noise floor from the amplifing device. I'm not saying it won't work but, it's not showing first class spec's. For $100 bux it's ok but, a first class external antenna fed with some Times Micowave LMR 240 coax would be a less expensive route. Trouble is trying to get an RF adapter to feed your cell phone's outlet with LMR 240 connected to it. The cell phone manufacturers are very lame and don't really want you and me DX'ing the cell-band. They cater to the majority of brainless idiots who know nothing and never will hence; they sell more phones.
If you look around on the web you will find some neat goodies for cell phone enhancements. Great amplifiers are GMRS compatable and receive amplification is done with quality Galium Arsinide Field Effect Transistors (GASFETS) that have very low noise floors... . less than 1. 5 Db at full gain. Yes... you will spend more than 200 bux for such amplifiers but, you get what you really wanted. Really, a Gain Antenna (5. 3 DBd) with low loss short run coax is a better bang for your buck.
Regards
William
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