The present invention is a system and method of operating cellular devices in a synchronized manner. Each of the plurality of mobile cellular devices has a system clock, a display screen, a camera flash, and communicates with a communications network. A software application is loaded onto each cellular devices. A lead user selects a session activity that is to be performed by the cellular devices. The cellular devices first update system time to improved time synchronization. At an execution time, a session activity is performed simultaneously by all the mobile cellular devices.
