GSM signal

A close-up shows a wooden control panel with red switches and a coiled black cable on a desk, followed by a man in a light-colored shirt looking through a doorway into a room where other men stand, then a wide shot of a group of men in uniform standing in formation in a dusty yard, followed by a man in a light-colored shirt looking to the side as a uniformed officer stands behind him, then a large punching bag swings in front of the men in the yard, and finally a man in a suit and glasses looks through a glass window with the word "SUPERVISOR" visible above him.