You must install the Marvell/WTPTP drivers and LTE generic drivers so your PC can communicate with the MiFi in bootloader mode.
The primary utility used to interface with and flash the device. USB Drivers: You must install both the WTP (Wireless Trusted Platform) drivers LTE generic drivers for your computer to recognize the MiFi in download mode. Flash & Unlock Process Overview Driver Installation: vodafone m028t firmware download full
Most flashing tools for these modems require a Windows environment. You must install the Marvell/WTPTP drivers and LTE