Enter your device's IMEI , MAC address , and Serial Number (SN) , which are usually found on a sticker under the battery.
The USB connection dropped. Check your cable quality, clean the MiFi charging port, and reinstall the drivers. marvell mifitool v1400exe install
Hold down the device boot key (usually the Power button or WPS button). Enter your device's IMEI , MAC address ,
Ensure your PC/laptop is connected to power, and the MiFi device has at least a 50% battery charge. Enter your device's IMEI
Open Windows and expand the Ports (COM & LPT) section. You should see a listing for Marvell COM Port or Loader Port . Note the assigned COM port number. Using Marvell MiFiTool v1.4.0.0