How do I stop getting spam calls?

You can register your numbers on the national Do Not Call list at no cost by calling 1-888-382-1222 (voice) or 1-866-290-4236 (TTY). You must call from the phone number you wish to register. You can also register at add your personal wireless phone number to the national Do-Not-Call list https://donotcall.gov

Is there a way to block spam calls on Iphone?

Detect and block spam phone calls with third-party apps

Go to Settings > Phone.

Tap Call Blocking & Identification.

Under Allow These Apps To Block Calls And Provide Caller ID, turn the app on or off. You can also reorder the apps based on priority. Just tap Edit and then drag the apps in the order you want them.