Some hardware versions, such as certain M028T serial numbers, may be prone to "FBF errors" during the unlocking process. [GUIDE] UNLOCK MARVELL M028T/M023T [L02C17XXX]-AOL

When connected via USB, the tool identifies the model number, current firmware version, and IMEI of the MiFi device.

It is frequently used to write or restore the IMEI and MAC addresses if they become corrupted after a firmware flash or unlock.