How to firmware update on RC7630 that is embedded into my device

[jyijyi]

Why suddenly you can cross-compile the SDK?
BTW, did you install latest MBPL USB driver?
https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.VlyKgKWC.dpbs

you can also see here on how to use fwdwl application:

How to update the RC7620 firmware with "qmi-update-firmware"

I think, I understand the problem. I have an asynchronism with “mdev” and the /dev/ttyUSB0 is destroyed just after being initialized. The last test. INFO: QDL Port : /dev/ttyUSB0 INFO: Device Path: /dev/cdc-wdm0 INFO: FW Path : /usr/wit/applic/update/ Target image Info: Carrier :SIERRA FW Version :00.08.07.00 Model ID :SWI9X07H Package ID :000 PRI Version:000.057 SKU :9999999 Modem is in QDL mode. Continuing FW download Waiting for modem to come up in BOOT and HOLD…