To set call restrictions, you can typically do so through your phone settings or through your service provider. Here are some general steps to set call restrictions on a smartphone:
1. Open the Phone app on your device.
2. Go to the settings or options menu within the Phone app.
3. Look for an option related to call restrictions, call blocking, or call barring.
4. You may be able to block specific numbers, restrict calls to certain contacts, or set up a Do Not Disturb mode.
5. Follow the on-screen instructions to customize your call restrictions as needed.
If you are looking to set call restrictions through your service provider, you may need to contact them directly or log in to your account online to manage call settings.