My iPhone is ringing when I have my phone on silent.

Did you use the Mute switch on the left side of the phone above the volume buttons, or Do not Disturb?

If you used Do not Disturb do you have Repeated Calls turn on? Spammers know about that, and will call twice to bypass DND.

Hi JWazz,

We know how inconvenient spam calls can be. Take a look at the steps and information in this article to block those calls.

Detect and block spam phone calls

Have a good day.