Robocalls aren’t just annoying—they can be used for scams, identity theft, and account takeovers. While you can’t stop every unwanted call, you can reduce them dramatically by combining device settings, carrier protections, and a few consistent habits. Use the steps below in order; each layer adds protection.

1) Start with the easiest wins: settings on your phone

On iPhone (iOS)

  • Silence Unknown Callers: Go to Settings → Phone → Silence Unknown Callers and turn it on. Calls from numbers not in your contacts, recent outgoing calls, or Siri Suggestions go to voicemail.
  • Block specific numbers: Open the Phone app → Recents → tap the info icon (i) → Block this Caller.
  • Use voicemail strategically: Let unknown numbers leave a message. Legit callers usually will; many robocalls won’t.

On Android

  • Turn on spam protection: In the Phone app (often Google Phone) go to Settings → Caller ID & spam (or similar) and enable spam filtering and caller ID.
  • Screen unknown callers (where available): Some Android phones offer call screening that asks the caller to identify themselves before your phone rings through.
  • Block numbers: Phone app → call history → select number → Block/Report spam.

2) Enable your wireless carrier’s anti-robocall tools

Most major carriers offer free or low-cost call filtering that can label suspected spam, block known scam patterns, and let you set stricter rules. Look in your carrier’s app or account settings for options like:

  • Spam/scam call labeling (warnings on incoming calls)
  • Automatic blocking of high-risk calls
  • Allow lists (only contacts or approved numbers ring through)
  • Report spam features that improve detection over time

Tip: If you recently switched phones or SIMs, re-check these settings—some carrier protections don’t transfer automatically.

3) Add a call-blocking app (optional, but effective)

If robocalls are persistent, a reputable third-party call blocker can add stronger pattern detection and community reporting. When choosing an app:

  • Prefer apps with clear privacy policies and transparent data use.
  • Avoid apps that request unnecessary permissions or push aggressive upsells.
  • Start with the default blocking level and tighten only if you’re missing legitimate calls.

4) Tighten your habits to reduce future robocalls

  • Don’t answer unknown numbers unless you’re expecting a call. Answering can signal your number is “active.”
  • Never press keys to “opt out” during suspicious calls. That can confirm a real person picked up.
  • Limit where you share your number (contests, forms, online accounts). Use alternate numbers when possible.
  • Use a secondary number for sign-ups (e.g., a VoIP number) and keep your main number for banks, doctors, and trusted contacts.

5) If you have a landline, use targeted tools

Landlines are frequent targets because blocking features vary. Consider:

  • A call-blocking device that plugs into your phone line and blocks known spam numbers or lets you whitelist approved callers.
  • Carrier landline call screening (if offered) to filter likely scam calls before they ring.
  • Do-not-disturb hours (if your phone supports it) so overnight robocalls don’t wake you.

6) Report robocalls the right way

Reporting helps enforcement and improves detection systems. When you get repeated robocalls:

  • Report within your phone or carrier app (fastest way to improve filtering).
  • Document patterns (date/time, number shown, voicemail content) if calls are frequent or threatening.
  • Report suspected scams through official consumer protection channels in your country/region.

7) Troubleshooting: why robocalls keep getting through

  • Caller ID spoofing: Many robocallers fake local-looking numbers, so blocking single numbers may not help much—use filtering/screening instead.
  • Missed legitimate calls: If you enable strict blocking and miss real callers (schools, pharmacies, delivery drivers), switch to “silence” or “screen” rather than “block,” and add key numbers to contacts.
  • Call bursts after data leaks: If your number appears in a breached database, you may see spikes. Tighten filtering temporarily and avoid engaging with unknown callers.

Quick checklist (best results)

  1. Turn on Silence/Screen Unknown Callers (device setting).
  2. Enable your carrier spam protection.
  3. Add a call-blocking app if robocalls persist.
  4. Don’t answer unknown calls; let voicemail handle it.
  5. Report repeat offenders via your phone/carrier tools.

If you want, tell me whether you use iPhone or Android (and your carrier), and I can suggest the most effective combination of settings to turn on without blocking important calls.