Up to three custom SIM fields are available for each customer.
They can be created in the Edit Columns pop-up.
The fields can be named as you like with a maximum of 25 characters. They will appear as columns in the SIM list (if configured to be visible).
You can enter values for custom fields in the SIM details tab. Just double click or use the pencil icon next to the field to start editing. You can enter up to 64 characters for a custom field value.