QMI connection to a LTE modem "call failed"

Hi all,

I am using a Telit LM940 module to have LTE connection.
My problem is that I currently have two modules with the same characteristics but one of them doesn´t work properly. If I try to establish connection:

root@OpenWrt:/# uqmi -d /dev/cdc-wdm0 --start-network --apn internet --ke
ep-client-id wds
"Call failed"

And the connection state:

root@OpenWrt:/# uqmi -d /dev/cdc-wdm0 --get-current-settings
"Out of call"

I already know that the Telit LM940 only supports Raw-IP so I changed qmi_wwan driver to use it and the option autoconnect is disabled.

I followed the same steps for both modems and in the other one everything works without problems, so I am starting to think that it is a matter related to the hardware.

Any help?