qmi-firmware-update mc7455

[Nathaniel Haggard]

I'm trying to update the mc7455 to verizon firmware, but I get the
following error:

~# qmicli -d /dev/cdc-wdm0 --dms-set-operating-mode=offline
[/dev/cdc-wdm0] Operating mode set successfully
~# qmicli -d /dev/cdc-wdm0 --dms-set-operating-mode=reset
[/dev/cdc-wdm0] Operating mode set successfully
:~# qmi-firmware-update -t /dev/ttyUSB0 --update-qdl
SWI9X30C_02.24.05.06.cwe SWI9X30C_02.24.05.06_VERIZON_002.034_000.nvu

error: error creating device: unexpected response received in dload sdp:
0x70

/dev/ttyUSB0 does exist of course.
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