Selecting a Cellular Operator
To select a cellular operator from the Web Interface, see the procedure below.
From the dashboard, in the Networks section, click the
icon on an active modem.Click the SIM Settings button.

Modem settings
In the Operator section's Selection Mode dropdown, select Scan and select and click the Scan button. This operation may take a few minutes.

Scan and Select
Select the desired operator from the list.
Click the Save button.