The Internet of Things (IoT) is considered the driving force of current and future wireless communications. Examples include ATMs that request account balances from banks when customer withdraw money as well as sensor data transmissions, e.g. temperature information from industrial facilities. As early as 2008, more objects (machines) than people were connected to the Internet and the number continues to grow. In release 13, 3GPP has specified Narrowband-IoT (NB-IoT) as a new physical layer. This application note gives a short introduction to NB-IoT and shows the easy measurements with R&S instruments.