It will actually try to boost your GSM, 2G, 3G, 4G signal by reconnecting cell phone to the closest, best radio cellular tower. The boosted radio signal has improved stability and power resulting also in better call quality, better data transfer, longer battery life. Not only your signal will be boosted, but you will also improve the battery life of your phone and speed up internet. You will be able to stream, download movies faster, listen to internet radio, you name it.