to me look you are new on this box. when you upgrade firmware first you have to make sure which sim yor box have then download proper exact image and if boot loader required on that image download that1 with you to.
if you downloaded exact image for your box then do it through explorer.
some images need compactable booth loader for them first install image through explorer open new tab when image done then install boot loader file then do reboot.
if you put wrong files possible your box crash then you need 2nd stage booth loader with rs232 cabel for your box.
your box full name?
your box sim model?
your box current boot loader?
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