Smartphones are one of the most influential devices that we use in our everyday lives. Smartphones consist of the most advanced hardware and software technologies that exist in the world, all combined together into a miraculous single easy-to-use portable system. These lectures focus on the specifications, hardware modules, and OS (Operating System) iOS & Android that enable smartphones to perform various features and functionalities. Since there are so many smartphone types, in the lectures, three smartphones were selected and compared. The lecture covers the specifications of the Samsung Galaxy S6 edge, LG G4, and the iPhone 6 plus, which are among the most popular recently released smartphones in the world! With this new knowledge on Cellular Networks, Wi-Fi, Bluetooth, Platform, OS (Operating System), Chipsets, CPU (Central Processing Unit), GPU (Graphics Processing Unit), Display, Location & Navigation system, and new Wireless Charging systems, you will be able to analyze, design, and plan new smartphones for the future.