First-order effects

• Many Verizon Android customers get spam call filtering switched on automatically, with no signup and no fee — the $3 add-on era is effectively over for the default experience.
• iPhone users on Verizon are treated differently: they receive no default filtering and must download the Call Filter app themselves to be covered.

Second-order effects

• Rival US carriers now face pressure to match default-on filtering rather than keep it as a paid upsell, since a competitor is giving away at the network level what others may still charge for.
• Robocall operations lose reach as filtered calls divert to voicemail by default, shifting the economics toward callers who can defeat carrier detection — and raising the value of any premium identification tiers Verizon layers above the free baseline.

Third-order effects

• With the FCC clearing carriers to filter by default, voice spam defense moves from an app-store product to network infrastructure, making carriers the de facto gatekeepers of which calls ring through.
• If defaults become the norm across carriers, the remaining differentiation shifts to accuracy and premium features — and regulatory attention turns to how much call-blocking power concentrated in a few carriers is acceptable.