A signal booster is a device designed to enhance the strength of cellular signals. It works by capturing weak signals from nearby cell towers, amplifying them, and then rebroadcasting the improved signal within a specific area. This can help improve call quality and data speeds, especially in locations with poor reception, such as rural areas or inside buildings. Signal boosters consist of three main components: an external antenna, an amplifier, and an internal antenna. The external antenna collects the weak signal, the amplifier boosts it, and the internal antenna distributes the stronger signal to devices like smartphones and tablets. They are useful for both residential and commercial applications.