The file is a legacy mobile game file designed for older feature phones (like Nokia or Sony Ericsson) using the J2ME (Java 2 Micro Edition) platform. Quick Technical Summary File Name: GTA_Vice_City_Mobile_Action_240320.jar Platform: J2ME (Java mobile)
On a 240x320 screen with a number pad, piloting a helicopter allowed you to fly over the low-polygon version of Vice City. Because the game wasn't fully optimized for air travel in free roam, you could see the "edges of the world," glitch through buildings, and view the low-res textures from above. It turned a linear mission-based game into a sandbox exploration experience on a device that technically shouldn't have supported it.
Unlike the 3D console version, this mobile adaptation typically features a top-down view or side-scrolling mechanics to fit the hardware limitations of the era. Optimized Resolution: in the filename refers specifically to the 240x320 pixel resolution