Hello, thank you for your feedback. I understand your concerns on the Smart Call feature and I will be more than happy to assist you. The Smart Call feature gives you the option to block unknown numbers from any numbers that are not in your Contacts list. Navigate to and open the Phone app, tap More options (the three vertical dots), and then tap Settings. Tap Caller ID and spam protection, and then tap the toggle to turn it on. When your phone rings, the Block number and Report number options will appear at the bottom of the screen. This feature may not be available on all carriers, models, or software versions. Here is some additional information on blocking a phone number https://www.samsung.com/us/support/answer/ANS00062352/.