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As technology advances, it becomes harder to use. These days, its very common for a cellular phone call to drop off all of a sudden. You may not even be in a basement or an elevator (though, the probability increases). To combat this problem, you can install an amplifier which will help boost signals. PowerfulSignal provides such a cell phone booster that allows you to make dropped calls a thing of past (hopefully). They offer solutions for both cars and buildings.