[Q] Operator does not recognize on Omega Rom v56 topic

I flashed my I9300 from Carbon rom to Omega Rom v56. Everything is working perfectly. Just the operator shown "No Service", Network shown "Unknown" and my operation shown 45400 into the System Settings －> Connection -> More networks -> Mobile Networks.

The phone can calling, SMS, 3g data connection and IMEI all those working normally. Just it cannot show the operator name.

May I know does it have any solution?

Thanks!