About Restore factory settings

I have a MC7455 , due to configuration(at!usbcomp) errors, resulting in no ttyUSB2 , so i can not execute the AT command, but i can upgrade the firmware, What can I do to restore the factory settings。


What USB combination you used?
What are all port are you able to see??
If the module is in MBIM mode then you can refer [url]https://forum.sierrawireless.com/t/my-mc7710-cant-work-on-linux-after-plug-in-it-to-windows8/7986/1]