Huawei usb modem in storage mode (?)

hi !
i'm trying to use my usb modem to send sms.
it seems to be in storage mode (seen à /dev/sdb). should'nt it switch automatically to be used as a modem ?
ls -l /dev/serial/by-id/ doesn't show it
lsusb displays : Bus 001 Device 013: ID 12d1:14dc HUAWEI HUAWEI Mobile
thanks for your help
(i'm running last HAOS version on a generic pc)

Well if there is no driver or software for it native in HAOS (I'm thinking it's unlikely that there is based on what you are saying) you would need a Custom Integration or an App built especially for the device, or you would need to run Home Assistant in Container mode to get access to the hardware.

should'nt it switch automatically to be used as a modem

It's not clear to me what modem you are using nor what you are using it with?

In my experience I've always had to leverage usb_modeswitch to change modes on Huawei usb modems, although when I used the (now deprecated) gsm sms integration I switched to using an SIM800C for convenience.
After the integration was deprecated (and in anticipation of 2g switch-off) I switched to using Teltonika RUT240 router as an SMS gateway.