How to Block Unwanted Calls on Your Phone: A Quick Guide

Unwanted calls drain your time and energy. Spam calls, robocalls, and harassment can happen multiple times a day. The good news: you can block them right now. This guide shows you exactly how to stop unwanted calls on iPhone, Android, and other devices.

The Fastest Way to Block an Unwanted Call

Block a number immediately by following these steps based on your phone type.

On iPhone:

1. Find the call in your recent calls list
2. Tap the info icon next to the number
3. Scroll down and tap “Block this Caller”
4. Confirm by tapping “Block Contact”

The number is now blocked. They can’t call or text you. You won’t see their messages.

On Android (Samsung, Google Pixel, etc.):

1. Open your Phone app
2. Go to the recent calls or call history tab
3. Long press the number you want to block
4. Tap “Block number”
5. Confirm the action

Done. That number cannot reach you anymore.

Why You’re Getting Unwanted Calls

Knowing why you get these calls helps you prevent future ones.

Robocalls are automated calls from companies. They advertise products, claim you won a prize, or say you owe money. These aren’t real people calling you. They use computers to dial thousands of numbers at once.

Spam calls come from actual people trying to scam you. They pretend to be from your bank, the IRS, or a tech company. They want your personal information or money.

Harassment calls are deliberate attempts to bother you. Someone may be calling repeatedly to intimidate or annoy you.

Telemarketing calls are sales pitches for legitimate products. While legal in some cases, they’re often unwanted.

Your number ends up on spam lists when you enter it online, give it to a retailer, or respond to a scam. Scammers share lists of numbers that answered calls. This puts you on more spam lists.

Built-In Blocking Features on Your Phone

Every smartphone has native blocking tools. You don’t need to download anything.

iPhone Blocking Features

Do Not Disturb allows only your favorites to reach you. Go to Settings > Focus > Do Not Disturb. Choose which contacts can call through. This silences everyone else.

Silence Unknown Callers blocks calls from numbers not in your contacts. Open Settings > Phone > Silence Unknown Callers. Toggle it on. Calls from unknown numbers go straight to voicemail. You don’t hear them ring.

Block a specific contact through your contacts app. Find the person, tap edit, scroll down, and tap “Block this Caller.”

Check your blocked list anytime. On iPhone, go to Settings > Phone > Blocked Contacts. You’ll see everyone you’ve blocked.

Android Blocking Features

Block Unknown Callers on Google Pixel phones. Open the Phone app > Settings > Blocked numbers > Block unknown. This sends calls from unrecognized numbers to voicemail.

Block on Samsung devices. Open Phone > More options > Settings > Blocking > Add block number. Type the number and save.

Block through your contacts. Find the contact, tap the three dots menu, select “Add to rejected list.”

Review your blocked list. Go to Phone app > Settings > Blocked numbers. All blocked numbers appear here.

Use Google’s Call Screen. This feature answers suspected spam calls for you with an automated message. You see a transcript later. It’s available on Pixel phones.

The built-in tools work well for numbers you know about. They don’t catch new spam numbers. That’s where additional tools help.

Using Apps to Block Calls

Apps provide advanced spam detection. They recognize known scam numbers and block them before your phone rings.

Popular Call Blocking Apps

TrueCaller identifies callers before they ring. It has a huge database of spam numbers. The app shows you who’s calling even if they’re not in your contacts. Free and paid versions exist. TrueCaller works on iPhone and Android.

RoboKiller listens to spam calls with “answer bots.” These are voices that waste the scammer’s time. Your phone never rings. It learns your preferences and gets smarter over time. It’s mainly paid but very effective.

Nomorobo blocks robocalls and spam before they reach you. You can whitelist numbers to always get through. It works across most phone carriers.

Hiya identifies spam and blocks it automatically. It shows you caller information for legitimate calls too. Free version blocks basic spam. Premium version blocks more.

AT&T Call Protect (for AT&T customers) or Verizon Call Filter (for Verizon customers) come built into your carrier account. They may be free or require a small monthly fee. Ask your carrier about these.

AT&T Mobile Security and T-Mobile Scam Shield offer similar features through your carrier.

Most apps require permission to access your call logs. Read what permissions they ask for before installing.

Do Not Call Registry and Legal Protection

The National Do Not Call Registry exists to reduce telemarketing calls.

Register your number for free. Visit donotcall.gov. Enter your phone number. Your number stays on the list forever. You don’t need to renew it.

Wait 31 days. Telemarketers have one month to honor your request after you register.

What this protects you from: Legitimate telemarketing calls must stop. Political campaigns and charities can still call you even if you’re registered, though you can ask them to stop.

What this does NOT protect you from: Robocalls from scammers. They ignore the registry. Calls from companies you do business with can still reach you. Debt collectors can still call (that’s separate law).

Register your number anyway. It reduces legitimate telemarketing calls. Combined with blocking apps, you’ll notice fewer calls.

Techniques to Prevent More Unwanted Calls

Stopping the calls you already get matters. Preventing new ones matters more.

Be cautious where you give your number. Online forms, retailer checkout screens, and contest entries often go to spam brokers. If a website doesn’t clearly state how they’ll use your number, don’t give it to them.

Use a secondary number for online purchases. Google Voice gives you a free second number. Use it for shopping, contests, and public signups. Keep your real number private. Your real number gets fewer spam calls this way.

Don’t answer unknown numbers. Let them go to voicemail. Scammers want to know the number is active. When you answer, you confirm it. They keep calling or sell your number. Legitimate callers leave a message.

Never press buttons on robocalls. Pressing any button confirms the number is monitored. This guarantees more calls. Just hang up.

Don’t give personal information to unknown callers. Real companies ask for sensitive info in secure ways, not by phone. If someone claims to be from your bank or the IRS, hang up and call the official number on their website.

Report spam to your carrier. Most carriers let you report numbers. Open your call log, find the spam call, and report it. Your carrier blocks it for other customers too.

Report to the FTC. File a complaint at reportfraud.ftc.gov. The FTC uses reports to take action against scammers.

Blocking Calls Based on Number Type

Different call types need different approaches.

Call Type	Best Solution
Robocalls	Call blocking app like RoboKiller or Nomorobo
Telemarketing	Register with Do Not Call Registry + built-in blocking
Known scammers	Block the number directly in your phone
Repeated harassment	Block the number and report to police if threatening
Unknown callers (general)	Enable Silence Unknown Callers (iPhone) or Block Unknown (Android)
Calls from a specific person	Use built-in block feature in your contacts

What to Do If You’ve Already Given Your Number to Scammers

Your number is on spam lists now. You can’t undo that, but you can reduce incoming calls.

Start using an app like TrueCaller or RoboKiller immediately. These catch spam before it reaches you. The apps improve over time as they learn new spam patterns.

Don’t change your number unless calls are truly unmanageable. A new number will eventually get added to spam lists too.

Block every number that calls you. Over weeks and months, fewer new numbers will try to reach you. The spammers move on to fresher numbers.

Report every spam call to your carrier and the FTC. This helps authorities track patterns.

Consider using Google Voice as your public number. Keep your real number private for people you trust. Most spam will hit your Google Voice number instead.

Step-by-Step: Setting Up Full Protection Right Now

Follow these steps today to reduce unwanted calls significantly.

Step 1: Register with Do Not Call Registry. Go to donotcall.gov on your computer or phone. Enter your number. Take 2 minutes.

Step 2: Enable built-in blocking. On iPhone, go to Settings > Phone > Silence Unknown Callers and turn it on. On Android, open your Phone app and look for Block Unknown Callers in settings.

Step 3: Block known spam numbers. Go through your recent calls. Block anything you don’t recognize. Spend 5 minutes on this.

Step 4: Download a call blocking app. Choose one from the list above. TrueCaller is free and effective. Install it and allow it to access your call logs.

Step 5: Review app permissions. Make sure the app can identify incoming calls. Most apps need this to work.

Step 6: Report spam. After you block a number, report it to your carrier or the FTC. This helps stop it for others.

Step 7: Use a secondary number online. Get a free Google Voice number. Use it for shopping, contests, and online signups. Keep your real number private.

These steps take about 15 minutes total. You’ll see fewer calls within a week.

When to Take Further Action

Most people solve the problem with the steps above. Some need more help.

Document repeated calls from one person. Save dates, times, and any voicemail messages. If someone is actively harassing you, this documentation helps law enforcement.

Contact local police. File a report if someone is threatening or repeatedly harassing you despite being told to stop. Give them your documentation.

Consult a lawyer. If harassment is severe or doesn’t stop, a lawyer can send a cease-and-desist letter. This is often enough to stop the behavior.

Consider a new number. If you’re being actively stalked or harassed, getting a new number prevents the person from reaching you. Inform trusted contacts only.

Most unwanted calls stop with blocking and Do Not Call registration. Harassment requiring police intervention is rare.

FAQs

Will blocking a number let them know they’re blocked?

No. When you block someone, their calls go to voicemail silently. They might leave a message, but they don’t see a notification that says “blocked.” They might figure it out if the calls always go to voicemail, but your phone doesn’t tell them.

Can scammers spoof a number to get around my blocks?

Yes. Scammers use software to make calls appear to come from different numbers. If a “bank” calls you from what looks like a real number, it might be spoofed. This is why answering is risky. Don’t assume the number shown is real. Always call the official number on the back of your card or their official website.

Should I change my phone number to stop spam calls?

Only as a last resort. Your new number will eventually end up on spam lists too. It takes weeks or months, but it happens. You lose convenience by changing. Use the blocking methods in this guide first. They work for most people.

Are call blocking apps safe?

Reputable apps like TrueCaller, RoboKiller, and Nomorobo are safe. They’re used by millions of people. Always download from your official app store (Apple App Store or Google Play), never from third-party sites. Read reviews before installing. Avoid unknown apps with no reviews.

What if a legitimate call gets blocked?

If you block a legitimate number by mistake, go to your phone’s blocked list and unblock it. On iPhone, Settings > Phone > Blocked Contacts. On Android, Phone app > Settings > Blocked numbers. Find it and remove it. You can call them back manually. Most important numbers will call multiple times or leave a message, giving you a chance to unblock them.

Conclusion

Unwanted calls don’t have to control your phone. You have multiple tools available right now to block them. Start today with the three most important steps: register with Do Not Call Registry, enable your phone’s built-in blocking feature, and block known spam numbers. Then add a call blocking app for extra protection. These actions work together to cut unwanted calls dramatically within days and weeks.

Most spam calls stop once you take action. The combination of official registry protection, native blocking, and detection apps catches the vast majority. Your phone will ring for the people who matter.