Rc7620 not registering on network

[jyijyi]

other use does not find problem, you can try their FW first:

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…