A Cellular Signal Booster,also known as a repeater or signal booster,is an electronic device specifically designed to enhance mobile signals.They are used to improve the quality of communication and data transmission. However, some improper use may cause interference to cellular network base stations.

Signal repeaters are a valuable tool for improving the range of signals in a variety of applications. However, it is important to note that repeaters can also be used to illegally boost the signal of cell phones, which can interfere with legitimate cell phone traffic. In some countries, the use of signal repeaters without a license is illegal.