A system and apparatus that allows cell phone users to control the roaming features of their service from one telecommunication network (i.e., cellular service provider) to another at the device level, independently of a particular primary network. More specifically, it intends to perform primary functions using the principles of (SoC) design, allowing an array of third party smart cards to share the motherboard of the universal cellular circuit, thus, allowing for ease of switching service providers by simply pushing a button on the apparatus. In addition, this device is equipped with a digital security diagnostic port (DSDP), allowing the scanning of the physical layer of the cellular circuit for unwanted/unexpected chips and other digital security breaches. For the cause of unprecedented efforts to accelerate the design, production, implementation, and distribution of new technologies (SoC design, ESL design, Robotics . . . ), this invention addresses a future threat to human-computer interactions (HCI) and public safety.