To block spam calls on your iPhone, use Silence Unknown Callers in your iPhone settings. This free feature sends calls from unknown numbers directly to voicemail, so they won’t interrupt you. Here’s how to block spam calls on iPhone:
- Open Settings → Phone.
- Tap Silence Unknown Callers.
- Toggle the switch to ON (green).
Now, calls from numbers not in your contacts, recent calls, or Siri Suggestions will be silenced. If you need more ways to stop spam, keep reading for step-by-step guides, carrier tools, apps, and tips.
What Happens When You Block Spam Calls?
Blocking spam calls stops unwanted interruptions and protects you from scams. Here’s how different methods work:
| Method | How It Works | Best For |
|---|---|---|
| Silence Unknown Callers | Blocks calls not in your contacts. | Quick, no-app solution. |
| Carrier Spam Filters | Uses your phone company’s spam list. | Automatic blocking (Verizon, AT&T, T-Mobile). |
| Spam-Blocking Apps | Blocks numbers reported by users worldwide. | Extra protection with crowd-sourced lists. |
How to Block Spam Calls on iPhone: 6 Methods
Method 1: Silence Unknown Callers
This built-in iPhone feature is the easiest way to stop spam.
Steps to Turn It On:
- Open Settings → Phone.
- Tap Silence Unknown Callers.
- Toggle the switch to ON.
What to Know:
- Works for: Calls from strangers, robocalls, and telemarketers.
- Doesn’t work for: Doctors, delivery services, or new friends unless you add them to your contacts.
- To turn it off later, repeat the steps and toggle the switch OFF.
Method 2: Use Your Carrier’s Spam Filter
Most phone companies offer free spam-blocking tools.
For Verizon Users:
- Open your Phone app and dial
#662#. - Press Call → Wait for the “Scam Block Activated” message.
- To turn it off later, dial
#632#.
For T-Mobile/Sprint Users:
- Open your Phone app and dial
#662#. - Press Call → Wait for confirmation.
How It Works:
- Your carrier blocks numbers flagged as spam.
- Blocked calls go straight to voicemail.
Method 3: Download a Spam-Blocking App
Apps like Truecaller or RoboKiller add extra protection.
Best Free Apps:
| App Name | What It Does |
|---|---|
| Truecaller | Shows caller names and blocks spam. |
| RoboKiller | Blocks robocalls and lets you create block lists. |
Setup Steps:
- Download the app from the App Store.
- Open Settings → Phone → Call Blocking & Identification.
- Toggle on the app under Allow These Apps.
Tip: Need to save a spam call as evidence? Learn how to record calls on iPhone.
Method 4: Block Numbers Manually
Block repeat offenders one by one.
Steps:
- Open the Phone app → Recents.
- Tap the ⓘ icon next to the spam number.
- Scroll down → Tap Block this Caller.
To Unblock Later:
- Go to Settings → Phone → Blocked Contacts.
- Swipe left on the number → Tap Unblock.
Method 5: Sign Up for the Do Not Call Registry
Stop legal telemarketers (not scammers) for free.
Steps:
- Visit donotcall.gov.
- Click Register Your Phone.
- Enter your number and confirm via email.
Note: It takes 31 days to start working.
Method 6: iOS 18’s Live Voicemail
Live Voicemail lets you read voicemails as they’re recorded.
How It Helps:
- See a live transcript of the voicemail.
- Decide mid-message if you want to answer.
5 Tips to Avoid Spam Calls
- Never say “Yes” to unknown callers—scammers record your voice.
- Don’t press buttons like “1” to “unsubscribe”—it confirms your number is active.
- Add trusted numbers (like your bank) to your contacts.
- Report spam numbers to your carrier or voicespamfeedback.com.
- Update your iPhone regularly for new security features.
What If Spam Calls Still Get Through?
- Combine methods: Use Silence Unknown Callers + a spam app.
- Check carrier settings: Ensure filters are on (e.g., Verizon’s Scam Block).
- Reset network settings: Go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings.
Need more help? Explore our iPhone Wi-Fi settings guide or learn how to use the Action Button on iPhone for quick access to settings.
FAQ: 5 Common Questions About Blocking Spam Calls on iPhone
1. Will blocking spam calls stop all unwanted calls?
Answer: No method blocks 100% of spam calls, but combining tools like Silence Unknown Callers, carrier filters, and apps like RoboKiller will stop most of them. Scammers constantly change tactics, so layering these tools gives you the best protection.
2. Can spam-blocking apps read my messages or listen to my calls?
Answer: No! Apps like Truecaller or RoboKiller cannot listen to your calls or read your messages. Apple’s privacy rules only let them check phone numbers against spam lists. Always download apps with high ratings (4+ stars) to stay safe.
3. What if I miss an important call (like from my doctor)?
Answer: If you use Silence Unknown Callers, add important numbers (like your doctor’s office) to your Contacts first. If you’re expecting a call from a new number, temporarily turn the feature OFF in Settings > Phone.
4. Is the Do Not Call Registry worth signing up for?
Answer: Yes! It stops legit telemarketers from calling you. While scammers ignore it, signing up reduces the number of unwanted calls. It’s free and takes 5 minutes at donotcall.gov.
5. Why do I still get spam calls after blocking them?
Answer: Scammers use fake numbers (called “spoofing”) to trick you. If a spam call slips through, block the number manually and report it to your carrier. Over time, your phone’s filters will learn and block similar numbers.
Conclusion:
Spam calls are annoying, but you don’t have to live with them! Use your iPhone’s built-in tools like Silence Unknown Callers and your carrier’s spam filters first—they’re free and easy to set up. For extra protection, add a trusted app like RoboKiller. Remember:
- Update your iPhone regularly for new security features.
- Never share personal info with unknown callers.
- Teach friends and family these tips to help them stay safe too.
By mixing these strategies, you’ll block most spam calls and enjoy peace of mind. Stay smart, and keep your iPhone spam-free!