: The F220B uses a Qualcomm chipset, so the PC must recognize the device in "EDL Mode."
Flashing firmware carries risks. If the process is interrupted or the wrong file is used, the device can become "bricked" (permanently unbootable). Always ensure your phone has at least 50% battery and that you have backed up any important data, as the flashing process will completely wipe the device.
: This likely indicates the version number and the build date (May 11, 2019).
