Here is the instruction on how to update ICOM A, A2 firmware to the newest version 1.4, with free download “ICOM A2 Firmware V1.4 BootImage Bin”.
Free download ICOM firmware V1.4:
https://mega.nz/#!X14TxZYY!6zrJ6og9gR5u-CcGbGtWSpHBCknjhl-LElommEgYSK0
Compatible tool:
Or other ICOM emulator at UOBDII.com
For BMW ICOM firmware update reference:
(update file in :D\ICOM_firmware-01_40_00)
1.Please connect your ICOM with LAN cable to the computer, charge ICOM via 12V power adapter.