Wireless Joint

The trick from Rooter did work. I had to do this:

echo 1199 9091 > /sys/bus/usb-serial/drivers/option1/new_id

on my WRT and the connect with picocom /dev/ttyUSB0 and set the correct 1,3,1009 and I got my modem back!

Thanks!

The modem was in WBIM mode.

AT+QCFG="usbnet",0

Changed the Modem to USB mode and it worked right away
Back to WBIM:

AT+QCFG="usbnet",2