Problem MC7455 internet connexion with network manager

[Nassim Dahmani <nassim interactive-mobility com>]

Hi everyone,

I'm trying to setup a connexion to internet through a MC7455 modem but i've some issues

~$ sudo nmcli c add type gsm ifname cdc-wdm1 con-name modem apn mmsbouygtel.com

~$ sudo nmcli con show

NAME       UUID                                                               TYPE      DEVICE           

modem    4715ae50-953e-4186-bf21-b223d143ab7c     gsm             --           

~$ nmcli c up modem ifname cdc-wdm1

Error: Connection 'modem' is not available on the device cdc-wdm1 at this time

~$ nmcli d

DEVICE          TYPE          STATE            CONNEXION

cdc-wdm1       gsm          not managed            ---

Thank you for your help I'm newbie to this and i don't really know what you'll need so please tell me if something is missing

Regards