Mobile devices have advanced so much that it is possible to control everything easily - documents, music, even electrical devices from distance. This is the reason why the recent years all big manufacturers of mobile devices have started re-embedding modules with infrared (IR) ports in phones and tablets. These IR ports give the opportunity to control electrical devices, which are currently controlled with regular remote controls throughout infrared signals. This book considers the main question how to develop a modern universal remote control in a mobile phone for controlling electrical devices. The proposed remote control (application) will be able to control a wide number of electrical devices used in our daily life. For example, television sets, audio and video systems, air conditioning, DVD and CD players and others, which can be controlled by an ordinary remote control with infrared signals. In order to work properly the mobile application has to use the built-in infrared port (called blaster).