Your phone can now screen spam calls for you

Spam calls waste your time and expose you to scammers. The good news: your phone already has built-in defenses you probably haven't turned on yet.

Both Apple and Google have quietly embedded anti-spam technology into iOS and Android. These aren't experimental features—they're ready to use right now, and they work by putting a barrier between you and unknown callers before you even have to decide whether to pick up.

iPhone's call screening

If you're on iOS, Apple's call screening feature (available since iOS 16) does something simple but effective: it answers unknown calls with an automated voice that asks callers why they're calling. You see their response transcribed on your screen, then decide whether to actually talk to them. Most scammers hang up immediately rather than explain themselves to a robot.

To enable it, go to Settings > Phone and find "Screen Unknown Callers." You get three options: never screen (calls ring normally), ask for a reason (the screening feature), or silence (unknown callers go straight to voicemail without ringing). There's also a toggle to separate missed calls from unknown numbers into their own list, so they don't clutter your main call history.

Once you identify a spam number, blocking it takes seconds—just tap the blank avatar in the Phone app and choose "Block Contact." If you want additional layers of protection, apps like RoboKiller, Hiya, and Truecaller integrate with your phone's native systems. Your carrier might also offer its own security app; AT&T has ActiveArmor, for example.

Android's approach

Pixel phones offer similar call screening, accessible through Phone app Settings > Caller ID and spam. Enable "See caller and spam ID" and the phone flags suspected scammers before you answer. You can also activate call screening to hear what unknown callers have to say before picking up.

Samsung Galaxy phones have caller ID and spam protection built in as well, though the call screening feature is currently a Pixel exclusive. Like iPhones, you can block specific numbers or automatically block all calls from unknown contacts through the Phone app's block numbers settings.

Android users also have third-party options—Call Blocker, Should I Answer?, and CallApp all work across different manufacturers. Verizon offers Call Filter Plus for additional protection.

The pattern is clear: the major phone makers have recognized that spam calls are a problem worth solving, and they've baked solutions into the operating system itself. You don't need to download anything or change carriers. The tools are already in your pocket.