Narrowband Internet of Things (NB-IoT) is a Low Power Wide Area Network (LPWAN) radio technology standard developed by 3GPP to enable a wide range of cellular devices and services. It is designed for use in Internet of Things (IoT) applications, where low power consumption and wide area coverage are key requirements. NB-IoT operates on licensed spectrum in the cellular network, allowing it to provide secure and reliable data transmission over distances of up to 15 km. In addition to IoT applications, NB-IoT can also be used for machine-to-machine (M2M) communications. NB-IoT is particularly suitable for applications that require low data rates, such as environmental monitoring, smart metering, and smart city applications.