You can dramatically cut down spam calls by combining built-in phone settings, official registries, and a few practical habits.

Quick Scoop

  • Turn on your phone’s spam protection and block numbers as they come in.
  • Use call-blocking apps or your carrier’s tools to silently filter likely spam.
  • Add your number to your country’s official “Do Not Call” registry, if available.
  • Never interact with suspicious callers (don’t press buttons, don’t call back, don’t share info).

1. Use your phone’s built‑in tools

On most Android phones (Google Phone app, many others)

  • Turn on caller ID & spam protection
    • Open Phone app → Settings → “Caller ID & Spam” or similar.
    • Turn on options like “See caller ID” and “Filter spam calls.”
  • Block specific numbers
    • Open recent calls → tap the spam number → choose “Block” or “Block/report spam.”
    • Optionally mark as spam when asked, which helps spam detection for everyone.
  • Silence unknown/private numbers
    • In Phone app settings, look for “Block unknown/private numbers” or “Silence unknown callers.”
    • These calls won’t ring but will usually show in your call history.

On Samsung Galaxy (Smart Call)

  • Open Phone app → Menu (three dots) → Settings.
  • Tap “Caller ID and spam protection” → toggle it on, accept terms if prompted.
  • Some models let you choose to show warnings or automatically block suspected spam.

(If you’re on iPhone, similar features exist under Phone → “Silence Unknown Callers” and carrier spam tools, though that’s not in the sources above.)

2. Use call‑blocking apps and devices

Call‑blocking tools add another layer of defense.

  • On smartphones, apps can:
    • Block or label calls likely to be scams.
    • Let calls go straight to voicemail without ringing.
    • Block calls by area code or custom lists.
    • Let you keep “allow lists” so important numbers always get through.
  • For landlines, separate call‑blocking boxes can:
    • Send blocked calls to voicemail.
    • Use allow lists and “do not disturb” hours.
    • Play a short challenge message (e.g., “press 1 to connect”) to filter out most robocalls.

When you install an app, review what data it collects and check recent reviews, since it may need access to your call logs to function.

3. Register your number (Do Not Call)

Official “Do Not Call” registries reduce legit telemarketing, though scammers may ignore them.

  • In the US, you can register at the National Do Not Call Registry.
  • After registration, legitimate marketers should stop calling after a short grace period.
  • You can also report unwanted calls that violate the rules, which helps enforcement agencies track bad actors.

Even with this, expect some spam to slip through, especially from outright scammers. That’s why you still need blocking and careful habits.

4. Safe habits that reduce spam

Technical tools help, but your everyday behavior matters just as much.

  • Don’t answer unknown numbers if you don’t have to; let them go to voicemail.
  • If you accidentally answer and it sounds like a robocall or scam:
    • Hang up immediately.
    • Don’t say “yes” to odd questions and don’t give personal or payment info.
    • Don’t press numbers “to speak to an agent” or “to be removed from the list” – that can confirm your number is active.
  • Avoid posting your phone number publicly online when possible.
  • If you lost money or gave out sensitive info, report it to consumer protection agencies (for example, FTC sites mentioned in the sources).

5. A couple of “forum‑style” tricks (use with caution)

Online discussions sometimes mention low‑tech tricks that people feel helped them, though they’re not official guidance.

  • One shared tactic:
    • Answer the call, immediately mute your microphone, and stay silent until the caller/robodialer hangs up.
* The idea: some systems may treat a silent, unresponsive line as “dead” and remove it from their lists.
  • Important caveats:
    • There’s no guarantee this works across systems.
    • You still shouldn’t engage or share any information.
    • Official blockers and filters are more reliable long‑term.

6. Putting it all together (simple plan)

If you want a quick, practical setup:

  1. Turn on spam protection and caller ID in your phone settings.
  1. Start blocking and reporting spam numbers as they appear.
  1. Add your number to your country’s Do Not Call registry if available.
  1. Install a reputable call‑blocking app or use your carrier’s spam‑filtering service for extra protection.
  1. Change your habits: don’t engage with suspicious calls, never share personal info, and let unknowns go to voicemail.

TL;DR: Use your phone’s built‑in spam filters, a call‑blocking app or carrier service, and a Do Not Call registry, then combine that with cautious behavior to greatly reduce spam calls and avoid scams.

Information gathered from public forums or data available on the internet and portrayed here.