Question Firmware Replacement

[Computer savvy]

Hello Experts,
I have software damaged 4G ZTE Dongle,
I don't know how to fix them and i cannot find anyone to fix it,
Is there someone to Help me....!

 

[nigelivey]

They are not worth the bother to repair, purchase another!!

 

[Computer savvy]

ZTE LTE uFi
Model : MF920VS

Do you know how to reinstall this firmware..