Rapid urbanisation is a growing challenge worldwide. To offset its detrimental effect, cities across the globe are turning to technology as means for building effective infrastructure under the umbrella term of “smart city”. With the latest advancements in technology and changing human behaviour in the context of “smart” mobile devices, this work aims to obtain profound understanding of a “smart city” and its characteristics, explore technologies that can be used for effective city infrastructure development, and what role the “smart” mobile device might have in driving this forward. In the context of this study, extensive literature has been reviewed, and a case study method has been used to examine the topic and provide real-life examples of a “smart city”. The subject of this research was the city of Frederiksberg in Denmark, and a wide array of “smart city” solutions they have in place with a specific emphasis on “Smart Mobility”. The results gathered point to the positive correlation with the previous studies and literature overview, suggesting that “smart city” could be the key for improving the quality of life and effective infrastructure development. Certain limitations exist to the broad nature of the topic, hence further research with a narrow focus is advised. This work contributes to the field of “smart cities” and has a potential to enrich and inspire cities, and fellow researchers in further exploration of the area.