Hi Heru Chalthoum,
In your post you mentioned if Kannel does not have connection to operator SMSC we can put Kannel mobile number as SMSC number in SIM card. I'm trying to do that and can you guide me on how to do it?

What I'm trying to do is replace the SMSC number on my SIM card/phone and send all text messages via Kannel SMSC.

Thanks,
Jacob