Here’s an informative guide on the — covering what it is, why you need it, how to find the correct version, and step-by-step flashing instructions. 1. What Is an Itel A11 Flash File? A flash file (also called stock ROM or firmware) is the official operating system software for the Itel A11. It contains the system image, bootloader, recovery, and other low-level partitions needed to restore the phone to factory condition.