1. Use Call Blocking Apps: There are numerous call blocking apps available for smartphones that can help you identify and block spam calls automatically. 2. Register on Do Not Call List: Add your phone number to the National Do Not Call List, which can help reduce the number of marketing calls you receive. 3. Block and Report: Most smartphones allow you to block specific numbers manually. If you receive spam calls from a particular number, block it and report it to your service provider. 4. Avoid Sharing Personal Information: Be cautious when sharing personal information over the phone, especially if you did not initiate the call. 5. Screen Unknown Calls: If you receive a call from an unknown number, let it go to voicemail. Legitimate callers will often leave a message.