There are in essence (in our opinion) two kinds of antennas and amplifiers for cell phone signals. The first kind is for use in homes, offices, apartments, etc, that is to say in buildings. These are oftentimes accompanied by long lengths of coaxial cables, however, there is no doubt whatsoever that they do work. This means that while in your home, office, apartment, etc where the device is being used you will experience better cell phone signals and less static as well as downloads on your cell phone or smart phone or PDA. However one does have to take into consideration that like the signals broadcast by your mobile service providers, these signals too cannot pass through thick walls and steel re-inforced walls and ceilings. The other type of signal amplifier is for use in cars and other vehicles. These types of amplifiers also do work and will improve the number of signal bars of your cell phone or smart phone or PDA but rest assured that if you are stuck in the middle of a desert with no service from your cell phone company it is highly unlikely that this device will amplify the non-existent signals (and consequently you will be in the same pickle as without any such device).
Accessories for the following laptop manufacturers are available at PDA Accessories: Acer, Averatec, BenQ, Canon, Dell, Fujitsu, Gateway, Hitachi, HP, iBooks by Apple, JVC, Mitsubishi, NEC, Nikon, Sony, Toshiba, Trigem, Viewsonic, WinBook, etc.
