Em7455 !boothold: not implemented

I am trying to upgrade my Em7455. It’s got super outdated firmware, and that’s causing my issues.

Recieve: ATI
Recieve: Manufacturer: Sierra Wireless, Incorporated
Recieve: Model: EM7455
Recieve: Revision: SWI9X30C_00.08.02.00 r1706 carmd-fwbuild4 2015/03/10 08:07:02
Recieve: IMEI: 359073060005497
Recieve: IMEI SV:  0
Recieve: FSN: LF511300090202
Recieve: +GCAP: +CGSM
Recieve: OK

I am trying to update it using this command:

λ  .\fdt2.exe -d 9x30 -f .\SWI9X30C_02.24.05.06.cwe SWI9X30C_02.24.05.06_GENERIC_002.026_000.nvu
FDT version: 1.0.1804.0
Awaiting suitable port or adapter ...
Switching to boot & hold mode ...
Disabling selective suspend ...
Awaiting DM port ...
Enabling selective suspend ...
Firmware download failed.
Primary error code: 82 - Failed in checking modem mode.
Secondary error code: 66 - Failed in initiazing comport.
Device error code: 0x0 - Unknown device error code.

Preexisting images information:
        Current:
                Firmware:
                        ImageId:
                        BuildId:
                Configuration:
                        ImageId:
                        BuildId:
Final images information:
        Current:
                Firmware:
                        ImageId:
                        BuildId:
                Configuration:
                        ImageId:
                        BuildId:

OEM PRI:

IMEI:

Total time elapsed: 180547 ms.

Time to switch to boot mode: -1 ms.

Images downloaded:


Press Enter to continue ...

I also tried a one-click with this file 9999999_9904609_SWI9X30C_02.24.05.06_00_GENERIC_002.026_000

and I get this:

FDT version: 1.0.1702.1
Awaiting adapter ...                                                                                                                                         
Setting images preference ...
Enabling selective  suspend ...
Firmware download failed.
Primary error code: 51 - Failed to switch device to BOOT&HOLD mode.
Secondary error code: 201 - Failed to switch device to QDL mode.
Device error code: 0x0 - Unknown device error code
Preexisting images information:
Current:
Firmware:
    ImageId:
    BuildId:
    Configuration:
   ImageId:
    BuildId:
    Final images information: 
    Current: 
    Firmware:
    ImageId:
    BuildId:
    Configuration:
    ImageId:
    BuildId:                                                                                                                                                                                                                                                                                          
    OEM PRI:                                                                                                                                                                                                                                                                                                                  
    IMEI:                                                                                                                                                                                                                                                                                                                     
    Total time elapsed: 10329 ms.                                                                                                                                                                                                                                                                                                                                                                                                                                                          
    Images downloaded:                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
    Press Enter to continue ...

Hi,

maybe you are affected by the same issue mentioned here for the 7565 device.

https://forum.sierrawireless.com/t/solved-em7565-firmware-update-from-01-00-02-00-to-01-07-00-00/13010/21