How to Block Spam Calls and Robocalls on Your Phone (2026 Guide)

Spam calls and robocalls have become one of the most frustrating parts of owning a mobile phone. From fake IRS warnings to car warranty scams and silent calls designed to verify your number, these interruptions waste time, drain battery, and sometimes cost people real money. The good news: you can dramatically reduce spam calls using a mix of built-in settings, carrier tools, trusted apps, and simple privacy habits.

This guide walks you through exactly how to block spam calls and robocalls on both iPhone and Android, how carrier-level protection works, and how to stop your number from ending up on spammer lists in the first place.

What Are Spam Calls and Robocalls?

Spam calls are unsolicited phone calls, often made in bulk, that try to sell something, scam you, or harvest personal data. Robocalls are a subset of spam calls that use automated dialers and pre-recorded messages to reach thousands of numbers at once. While some robocalls are legal (appointment reminders, political messages in certain regions), the overwhelming majority of unwanted calls fall into the illegal or fraudulent category.

Common spam call categories include:

• Scam calls: fake tax agents, tech support scams, fake arrest warrants, cryptocurrency fraud.
• Telemarketing: extended car warranties, solar panels, timeshare offers.
• Phishing (vishing): callers pretending to be your bank or delivery service to steal credentials.
• Silent robocalls: auto-dialers verifying that your number is active for future targeting.

Why You Get So Many Spam Calls

Your number ends up in spam databases through several channels: data breaches, public records, loyalty program sign-ups, contest entries, and websites that sell contact lists to lead generators. Spammers also use "neighbor spoofing" to display numbers with your local area code, making you more likely to answer.

Once you answer or press any button, your number is flagged as "live" and gets passed to even more spam lists. That is why simply ignoring unknown calls is often more effective than engaging, even to say "stop calling."

How to Block Spam Calls on iPhone

Apple provides several built-in tools to filter out unwanted calls. Here is how to use each one.

1. Silence Unknown Callers

This is the single most effective iPhone setting for cutting robocalls.

1. Open Settings.
2. Scroll to Apps > Phone (or just Phone on older iOS).
3. Tap Silence Unknown Callers.
4. Toggle it On.

Calls from numbers not in your contacts, recent outgoing calls, or Siri suggestions will be sent straight to voicemail. You will still see them in your recent calls list in case a legitimate caller tries to reach you.

2. Block Individual Numbers

1. Open the Phone app and tap Recents.
2. Tap the info (i) icon next to the spam number.
3. Scroll down and tap Block this Caller.

3. Enable Call Filtering from Third-Party Apps

Go to Settings > Apps > Phone > Call Blocking & Identification and enable any installed spam filter apps like Hiya, Truecaller, or Robokiller.

4. Use Focus Modes

Create a Focus mode that only allows calls from your contacts or favorites during work hours or sleep. This acts as an extra firewall even if a spam call slips through.

How to Block Spam Calls on Android

Android options vary slightly by manufacturer (Samsung, Google Pixel, Xiaomi, etc.), but the core features are similar.

1. Enable Caller ID & Spam Protection

1. Open the Phone app.
2. Tap the three-dot menu > Settings.
3. Select Caller ID & spam (or Spam and Call Screen on Pixel).
4. Toggle on See caller & spam ID and Filter spam calls.

2. Turn On Call Screen (Pixel Users)

Google Pixel phones offer Call Screen, which uses Google Assistant to answer unknown calls on your behalf, ask the caller to identify themselves, and show you a live transcript. You can then decide to answer, mark as spam, or hang up.

3. Block a Specific Number

1. Open Phone > Recents.
2. Long-press the spam number.
3. Tap Block or Block/report spam.

4. Block Unknown or Private Numbers

In the Phone app settings, look for Blocked numbers and toggle Unknown callers or Private numbers. Use carefully, since this blocks legitimate unknown numbers too (doctors, delivery drivers, etc.).

Carrier-Level Spam Call Blocking

Most major carriers now offer free or low-cost spam blocking at the network level, which stops many robocalls before your phone ever rings.

Log in to your carrier's app or online account and enable spam blocking. These services use STIR/SHAKEN authentication to verify caller IDs and block spoofed numbers across the network.

Best Third-Party Apps to Block Spam Calls

If built-in and carrier tools are not enough, third-party apps add another layer of defense with constantly updated spam databases.

Top Picks

• Hiya — Clean interface, strong caller ID, free tier available.
• Truecaller — Massive crowdsourced spam database, popular globally.
• Robokiller — Uses "answer bots" to waste scammers' time; paid only.
• Nomorobo — Great for landlines and VoIP; low-cost mobile plan.
• YouMail — Replaces your voicemail with smart spam filtering.

Pros and Cons of Third-Party Apps

Pros:

• Larger spam databases than built-in tools.
• Advanced features like reverse lookup and SMS filtering.
• Community-driven updates catch new scams quickly.

Cons:

• Many require access to your contacts and call logs.
• Some upload your contact list to their servers, raising privacy concerns.
• Premium features often require a subscription.

Before installing any call-blocking app, read its privacy policy carefully. Choose apps that process data on-device whenever possible.

How to Stop Robocalls Before They Start

Blocking calls after they arrive is reactive. The real win is preventing your number from being harvested in the first place.

1. Register on Do Not Call Lists

• United States: donotcall.gov
• United Kingdom: Telephone Preference Service (tpsonline.org.uk)
• Canada: lnnte-dncl.gc.ca
• Australia: donotcall.gov.au

Legitimate telemarketers must honor these lists. Scammers will not, but it reduces the overall volume.

2. Stop Sharing Your Real Number Online

Use a secondary number for sign-ups, deliveries, and online forms. Services like Google Voice, Hushed, or MySudo provide burner numbers you can disable at any time.

3. Never Press Buttons or Say "Yes"

Pressing "1 to be removed" or responding to a prompt confirms your number is active. Hang up immediately on suspected robocalls.

4. Limit What You Share on Social Media

Scammers scrape phone numbers from public profiles, event pages, and marketplace listings. Keep your contact details private.

5. Be Careful With Shortened Links in Texts

Spam calls often come paired with smishing (SMS phishing) texts containing shady short links. If you need to share links yourself, use a reputable, transparent shortener like Lunyb, which lets recipients see link analytics and avoids the sketchy reputation of unknown redirect services. For a deeper look at trustworthy shorteners, see our 2026 buyer's guide to URL shorteners.

How to Report Spam Calls

Reporting spam helps regulators and carriers shut down bad actors.

1. Report to your carrier: Forward spam texts to 7726 (SPAM) in the US, UK, Canada, and Australia.
2. Report to regulators: FTC (ftc.gov/complaint) in the US, Ofcom in the UK, CRTC in Canada, ACMA in Australia.
3. Mark as spam in your Phone app: This feeds into carrier and app databases.

Advanced Privacy Tips to Reduce Spam

If spam calls are relentless, go further with these steps:

• Use encrypted DNS like Cloudflare 1.1.1.1 or NextDNS on your phone to block known scam domains that spammers use for callback links.
• Check if your number was leaked using services like Have I Been Pwned (which also tracks phone number breaches).
• Switch to a privacy-focused browser for mobile web activity to limit tracker-based profiling.
• Consider a secondary SIM or eSIM for high-risk sign-ups and keep your primary number private.
• Review app permissions — many apps request your phone number unnecessarily.

What to Do If You Fell for a Phone Scam

If you accidentally shared financial or personal info with a scam caller:

1. Contact your bank immediately and freeze accounts if needed.
2. Change passwords for any accounts you mentioned.
3. Place a fraud alert with credit bureaus (Equifax, Experian, TransUnion).
4. File a report with local police and your national fraud agency.
5. Monitor your credit report for suspicious activity for the next 12 months.

Frequently Asked Questions

Does *61 block spam calls?

On many US carriers, dialing *61 after a spam call will add that specific number to your block list. It only works for one number at a time and does not stop spoofed calls from new numbers, so it is best combined with carrier-level spam filtering.

Will blocking a spam number stop them from calling again?

It stops that exact number, but most robocallers spoof different numbers every time. Network-level spam blocking and "silence unknown callers" settings are more effective long-term solutions than blocking individual numbers.

Are spam call blocker apps safe to use?

Reputable apps like Hiya, Nomorobo, and Truecaller are generally safe, but many request access to your contacts and call logs. Always read the privacy policy, choose apps that process data on-device, and avoid uploading your entire contact list if possible.

Why do I still get spam calls after registering with Do Not Call?

Do Not Call registries only bind legitimate telemarketers. Scammers and overseas robocallers ignore the rules entirely. Combine registry sign-up with carrier spam filters, built-in phone settings, and cautious sharing of your number.

Can spam callers hack my phone just by calling?Can spam callers hack my phone just by calling?

Simply receiving or answering a call cannot install malware on a modern smartphone. The risk comes from what you do during the call — sharing personal info, pressing prompts, or clicking links in follow-up texts. Never share financial details or verification codes with unexpected callers.

Final Thoughts

Blocking spam calls is not a one-click fix — it is a layered strategy. Combine your phone's built-in silencing features, carrier-level spam protection, a reputable third-party app, and smart habits like keeping your number off public forms. Within a few weeks, you should see unwanted calls drop dramatically.

Privacy online and offline go hand in hand. The same caution you apply to phone calls should extend to the links you click, the sites you share information with, and the tools you trust with your data. For more practical guides on digital safety and trustworthy online tools, explore the rest of the Lunyb blog.