Here is what forum writer "The Apple" wrote on everythingcafe.com about the Wilson iBooster for the iPhone & iPhone 3G:
"The iBooster is a "plug and play" cellular booster kit for the iPhone. It will work with both the first generation iPhone, and the iPhone 3G. When I received the iBooster, the first piece that I removed from the box was the cradle.
The cradle has several mounting options, so it will mount in most any vehicle. I chose to use the adhesive mounts with the ball socket, that swivels in any direction. The kit also contained an adhesive mount that swiveled either up/down or side/side, depending on how you mounted it, and clip mounts so you could clip it on your vehicles vent slats. Clipping to the vent slats makes for a good temporary install that you can remove quickly if you need to switch to another vehicle.
The cradle comes with an insert, so your phone fits snugly in the cradle. If you remove the insert, the cradle will accomodate your phone with a case on it. The bottom of the cradle has 3 different jacks, one for the power, one for the antenna, and one for your 30 pin connector to pass audio.
The next item I removed from the box was the charger. The charger plugs directly into a cigarette lighter/charging port, and the other end plugs into the bottom of the cradle unit. The charger also has a power switch on it so you can turn the power off if your charging port is "full time" (so you don't drain your vehicle battery. The final item I removed from the box, was the antenna unit.
The antenna is magnetic mount so you just place it on top of your car for the best performance, route the wire, and plug it into the bottom of the cradle unit. When all is installed, power up the unit and put your phone into the cradle, put your stereo on aux. and you are set. Now you are charging, listening to audio, and not worrying about you signal dropping!
I have set my phone up so I can actually see what my signal strength is by numbers using the field test. The numbers normally range from -50 to -100, with -50 being strong signal, and <-100 dropping calls. (Keep in mind that these are negative numbers so the higher the number the better the signal.)
When I was going through a certain area where my signal was lost, I checked the signal strength and I had a strength of -108. (-108 = No Service) While stopped in this area I turned on the switch to power up my iBooster, my signal went from -108 to -63. (-63 = 5 bars) I was impressed! Driving around monitoring my signal strength for a couple weeks, I found I normally sit around -50. During a test run I drove through my commute, testing call quality and noted a noticable improvment in call audio quality due to the amplified signal.
I have not dropped a call in my car since installing and using this unit."
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