The script says "Done!" but nothing was affected on the modem

[HaswellAoba]

Hello.

When I used the script "autoflash-7455.sh" on this repository, the script says "Done!".
But the script literally affected nothing on my EM7455(in actually, DW5811e branded modem).

The brand(DELL) was not changed to the generic, and the firmware is the same. But still, the script just says "Done!".

I think there are some bugs on the script.

Have any ideas?

(This is my console output when using it)
sierra_output.txt