Keep your Xfinity Mobile number. Your phone rings first — RingReady answers only the calls you miss. It takes a couple of dial codes.
After you sign up you get your own RingReady number; your dashboard shows these same steps with it filled in, as tap-to-dial buttons.
Open Settings → Apps → Phone → Live Voicemail → toggle OFF.
This stops your iPhone from intercepting calls before forwarding takes effect. Skip this step on Android.Your AI receptionist answers the calls you can't — set up in about 3 minutes.