What is a NCT File Type?
To create the NCT file select File → New..., select Contact File "icon, click OK, file name, select the save location, and click Save.
To import another file into your NCT file select File → Import..., navigate to the file, and select Open.
You can sync your NCT file with another NCT by selecting File → Synchronize → Access the NCT file with a contact file, and then click Synchronize. To be synchronized with each other, NCT files must have the same origin.