Hide My Call includes a database of commonly known prefixe codes and will attempt to automatically set that code based on your country and carrier.

From time to time, as we learn new codes that prove to work for specific countries and/or carriers, we may update our database and make it available to user of Hide My Call.

To update the database, tap Settings and then tap the reload icon next to Set Prefix Code Automatically. Tap the Update Prefix Database on the action sheet that appears.