I am having issues sending SMS messages.
I tried and found out that calls and data connections, which result in sending emails, work when I close the contact on the PLC, but I receive the email and the call, while the SMS is not sent, displaying the error message:
009 WARN 2025-01-29 17:34:45,317 SMS message could not be sent.

I realized that the issue might be the SMSC number, but I don't know where I can change it. Does anyone know if it can be changed?

My SIM is Italian from the provider TIM, and the CMR2040 has assigned this SMSC number:
SMSC number +393359609600
but I read online that it should be +393359608000

PS. If I put the SIM in another Android device or GSM modem, it works perfectly with SMS, calls, and data communication.