Whether you can call a specific premium or service number, depends on the nature of the number that you are trying to call. Premium and service numbers are usually not reachable with the Talk360 app because of the high costs of calling these numbers.
If you are unsure, please send us a message to Support via the app, and we will check whether the number you are trying to call is reachable with the Talk360 app. Our support team is always ready to help you!