A cell phone signal booster (also known as amplifier or repeater) is made up of three main elements - exterior antenna, amplifier, and interior antenna.
Can't believe such a device really exists, I would like to check some feedbacks from real customers, is it possible? Anyways, I am using free mobile connection from Q Link Wireless, I think if you suffer from low quality and poor cell phone services, you should check this company or at least q link wireless customer service .