EM7565 stuck in some sort of update mode

I have an EM7565 under linux and somehow during our manufacturing process it is now stuck booting with a usb ID like


Bus 001 Device 004: ID 1199:9090 Sierra Wireless, Inc.

where it should be
Bus 001 Device 002: ID 1199:9091 Sierra Wireless, Inc.

fwdwl-litehostx86_64 can no longer run an update and the ttyUSB0 does not respond to AT commands . How do I recover a modem in this state?

You can try FDT tool in windows:

fdt2.exe -f SWI9X50C_01.14.03.00.cwe SWI9X50C_01.14.03.00_GENERIC_002.036_010.nvu

Also you can try fwdwl tool in linux (need to be the latest one MBPL_SDK_R28_ENG5-fwdwl)

sudo ./bin/fwdwl-litehostx86_64 -c QMI  -m 4 -d /dev/ttyUSB0 -f /home/jordan/Downloads/FW_EM74x1/SWI9X50C_01.14.03.00_GENERIC_002.036_010/

Btw, you need to use the latest firmware in the SWI SOURCE website

Thank you, that worked!