NB-IoT is the Internet of Things (IoT) technology used for cellular communication. NB-IoT devices deliver much better capability and performance such as increased area coverage of up to one Kilo-meter, massive number of devices up to 200,000 devices per a single base station area, longer battery lifetime of 10 years, and better indoor and outdoor coverage for area with weak signal such as underground garages. The cellular NB-IoT technology is a challenging technology to use and understand. With more than +30 projects presented in this book, covering many use cases and scenarios, it provides hands-on and practical experience of how to use the cellular NB-IoT for smart applications using Arduino, Amazon cloud, Google map, and charts. The book starts by  explaining AT commands used to configure the NB-IoT modem, data serialization and deserialization, how to set up the cloud for connecting NB-IoT devices, setting up rules, policy, security certificates, and NoSQL database on the cloud, how to store and read data on cloud, how to use Google map to visualize NB-IoT device geo-location, and how to use charts to visualize sensor datasets. Projects for Arduino are presented into four parts. The first part explains how to connect the device to the mobile operator and cellular network, perform communication using different network protocols such as TCP, HTTP, SSL, or MQTT,  how to use GPS for geo-location applications, and how to upgrade NB-IoT modem firmware over the air. The second part explains the microcontroller unit and how to build and run projects such as 7-segment display or real time clock. The third part explains how NB-IoT can be used with sensor devices such as ultrasonic and environmental sensors. Finally, the fourth part explains how NB-IoT can be used to control actuators such as stepper motors and relays. This book is a unique resource in understanding practical uses of the NB-IoT technology and serves as a handbook for technical and non-technical readers who are looking for practicing and exercising the cellular NB-IoT technology. The book serves and can be used by engineers, students, researchers, system integrators, mobile operators’ technical staff, electronics enthusiastic.