Built-in phone filtering: best free starting point

Apple and Google both provide caller identification and unknown-caller controls. They are easy to enable, cost nothing extra, and keep the setup simple. Their biggest tradeoff is that aggressive filtering can hide calls you actually need.

Carrier filtering: best network-level layer

Carrier tools can label or stop suspected spam before it rings. Free plans are often sufficient. Paid carrier tiers may add caller lookup, category controls, or more aggressive blocking, but features differ by carrier and plan.

Third-party blocker apps: best for custom controls

Dedicated apps may offer larger reputation databases and detailed rules. Compare privacy policies, app-store reviews, annual cost, and whether the app uploads contacts or call metadata. A blocker that catches more spam can also create more false positives.

Stall the Scam: for suspicious calls that get through

Stall the Scam does not identify or block a caller. It runs on a laptop or spare phone beside a suspicious incoming call and plays harmless stalling responses. Think of it as a complement to your blocker, not a replacement.

Try the one-minute speaker-mode demo →

Our practical recommendation

  1. Enable your phone’s free spam protection.
  2. Add the free carrier filter.
  3. Wait a week and measure what still gets through.
  4. Only then decide whether a paid blocker or speaker-mode tool solves a real remaining problem.

Frequently asked

Questions about spam calls

Are paid spam blockers better than free ones?

They can offer more controls and larger databases, but phone and carrier protections may already be enough for many people.

Does Stall the Scam block calls?

No. It is a speaker-mode stalling tool for a suspicious call that has already reached you.

Will a blocker stop spoofed numbers?

Reputation and network tools can reduce spoofed calls, but no blocker catches every changing or newly spoofed number.

Safety first. The FTC’s primary recommendation for unwanted and suspicious calls is to hang up, use call blocking, and report fraud. Read the FTC guidance.