Hi,
I'm using Modbus Register 205 for switch between SIM Card 1 or 2. This worked with old firmware without problems. Now I have the latest firmware RUT9XX_R_00.06.05.1 installed and the SIM card change does not work anymore. I can write the Modbus register correctly and the change starts. SIM card slot in use changes from SIM 1 Ready to SIM 2 (not inserted) and the data connection remains disconnected. I have to restart the router, so that the connection is rebuilt. Can you confirm that?
regards