Ringer is on silent and I can’t get it off.

First check that your phone is not in Do Not Disturb mode (on recent phones, swipe down from the top-right corner to open the control center, and look for the Do Not Disturb icon (which looks like a crescent moon).

Assuming Do Not Disturb is off, use the volume buttons on the side to raise the volume. When nothing is running on the app, this controls the ring volume.

Check the Mute switch on the left side of iPhone above the Volume buttons.

If you see red/orange the Mute is ON.

You're welcome.