How to Stop Spam Calls on iPhone and Android (2026 Guide)

To stop spam calls, turn on your carrier's free network filter, then your phone's built-in spam settings, and stop handing your number to new call lists. No single switch kills them all, because scammers spoof numbers and keep rotating them.

Start with the carrier, because it blocks calls before they reach your phone. Then do the phone settings and the Do Not Call Registry, and add an app only if you still need one. If the same phone is your business line, read the last two sections first: the strictest settings also silence new customers.

Why am I getting so many spam calls?

Your number is on lists. It got there from data breaches, sweepstakes forms, warranty registrations, public business listings, or a random dialer that simply tried every number in your exchange. Answering, even once, tells the dialer the line is live, and live numbers get sold and called more.

Two tricks make it worse:

• Spoofing: callers fake the caller ID. The FCC describes "neighbor spoofing," where the call appears to come from a local number so you are more likely to pick up.
• Number rotation: a scam operation burns through numbers fast, so blocking the one that just called you rarely stops the next call.

A personal block list can't keep up with that. Carrier and phone filters can, because they score a call by reputation and behavior.

Step 1: Turn on your carrier's spam filter

All three major US carriers include a free spam filter, and it works before the call reaches your phone. The filters use call analytics plus STIR/SHAKEN caller ID authentication, which the FCC requires providers to use in their IP networks.

Each carrier also sells a paid upgrade (caller ID names, reverse lookup, blocking whole categories like telemarketers or political calls). For most people the free tier plus the phone settings below is enough.

Two notes from the carrier support pages:

• Verizon sends spam to voicemail by default. Deleting the Verizon Protect app does not turn filtering off.
• AT&T warns that you need an active voicemail box to send callers to voicemail. Without one, calls from numbers not in your contacts may not go through at all.

How to stop spam calls on iPhone

These steps are for iOS 26 and later, where Apple moved call screening into Settings > Apps > Phone. Older versions use the same names under Settings > Phone.

Filter spam and unknown callers

1. Open Settings.
2. Tap Apps, then Phone.
3. Turn on Spam. Calls your carrier identifies as potential spam or fraud are silenced, sent to voicemail, and moved to a separate Spam list.
4. Optionally turn on Unknown Callers under filtering. Calls from numbers you have never interacted with move to an Unknown Callers list instead of cluttering Recents.

You can review both lists in the Phone app: tap Calls (unified layout) or Recents (classic layout), tap the filter button, then Unknown Callers or Spam.

Screen unknown callers instead of silencing them

Under Screen Unknown Callers in the same Phone settings, pick one option:

• Never: your iPhone rings for every number.
• Ask Reason for Calling: your iPhone answers unknown numbers for you, asks the caller for their name and reason, then rings and shows you the answer so you can decide.
• Silence: unknown numbers go straight to voicemail and show up in Recents.

Ask Reason for Calling is the best balance for most people. Robocalls rarely sit through the question, and a real person (a delivery driver, a doctor's office) gets through with context. Our guide to Silence Unknown Callers on iPhone and Android covers the tradeoffs in detail.

Block one number

1. Open the Phone app and find the call in Recents or Calls.
2. Tap the info button next to it.
3. Tap Block Caller (or, for a saved contact, open the contact and tap Block Contact).

To unblock: Settings > Apps > Phone > Blocked Contacts, tap Edit, then remove the number.

Add a call blocking app on iPhone

Third-party apps plug into iOS through Settings > Apps > Phone > Call Blocking & Identification. Install the app, then turn it on there. On the same screen, Business Call Identification shows verified business names from Apple Business Connect or your carrier, which helps you tell a real company from an impersonator.

How to stop spam calls on Android

Android menus depend on who made your phone. Most phones use either the Google Phone app (Pixel, Motorola, many others) or the Samsung Phone app.

Google Phone app (Pixel and most Android phones)

1. Open the Phone app.
2. Tap More options (three dots), then Settings.
3. Tap Caller ID and spam (some versions call it Spam and Call Screen).
4. Turn on See caller ID & spam. It is on by default.
5. Turn on Filter spam calls. Filtered calls don't ring or send missed-call notifications, but they stay in your call history and can still leave voicemail.

On Pixels that have automatic Call Screen, there is no separate Filter spam calls switch. Spam blocking lives inside the Call Screen options instead, and Call Screen can answer suspected spam for you.

To block one number: open the call in your history, tap it, then tap Block or Report spam. To block hidden callers: Settings > Blocked numbers, then turn on Unknown. Google notes this blocks private or unidentified numbers only. Numbers you simply haven't saved still ring.

Samsung Galaxy phones

1. Open the Phone app, tap the three dots, then Settings.
2. Tap Caller ID and spam protection and turn on the switch at the top. Accept the terms.
3. Turn on Block spam and scam calls, then choose Block all spam and scam calls or Only block high-risk scam calls.

To block a number, go to Settings > Block numbers and add it, or tap the number in Recents and choose Block. The same Block numbers screen has a switch to block calls from unknown numbers. Samsung defines those as numbers not in your contacts and not identified by Smart Call, which is much more aggressive than Google's version.

Does the Do Not Call registry stop spam calls?

It stops legal telemarketing and nothing else. The National Do Not Call Registry is a list legitimate telemarketers must check before calling you. Register free at DoNotCall.gov or call 1-888-382-1222 from the phone you want to register. Per the FTC:

• Your registration never expires.
• It can take up to 31 days for sales calls to stop.
• Political, charity, debt collection, survey, and informational calls are still allowed.
• It does not block calls, so it does nothing against scammers who already break the law.
• Business phone numbers are not covered.

So register your personal cell, then rely on filters for everything else. When a scammer still gets through, report the call at DoNotCall.gov (or ReportFraud.ftc.gov if you lost money). The FTC publishes reported numbers every business day, and carriers and blocking apps use that data.

Is a call blocking app worth it?

Only if your carrier's free filter and your phone settings still let a lot through. An app adds a bigger reputation database and, usually, category blocking. The FTC suggests checking app store ratings, expert reviews, and the CTIA's app lists before installing one, and reading the privacy policy, since some apps upload your contacts.

An app also makes sense if you want to block whole categories (telemarketing, surveys) or your phone and carrier have weak built-in filtering. Don't stack two or three blockers. You mostly add false positives.

How to stop getting spam calls in the first place

Filters catch the calls. These habits cut how many get made to you:

1. Don't answer unknown numbers you aren't expecting. Let screening or voicemail handle them.
2. Never press a button "to be removed from our list." The FCC says scammers use that trick to find live numbers.
3. Don't call back a missed call from an unfamiliar number, especially one that rang once. Check it first with a free spam number checker.
4. Keep your cell number off forms: contests, warranty cards, "free quote" sites that resell leads.
5. Set a voicemail password. The FCC warns that some voicemail systems let anyone who spoofs your own number listen to your messages.
6. Forward spam texts to 7726 (SPAM). Most carriers accept them for analysis.

Why business owners can't just silence unknown callers

Every setting above treats unknown callers as probable junk. For a plumber or a salon, an unknown number is often a new customer who found you on Google five minutes ago.

Here is what each setting does to that customer:

• Silence Unknown Callers sends new leads to voicemail, and many callers hang up instead of leaving a message.
• Samsung's Block unknown numbers drops them entirely.
• Ask Reason for Calling works better, but someone calling a business expects the business to pick up. They get your phone's screener.
• Do Not Call doesn't cover business numbers at all.

Business numbers are also spam magnets, because you publish them on your truck and in every directory. We broke down that problem for trades in Stop Spam Calls: The Contractor's Guide and the hidden time cost in the spam call tax.

A business line needs screening that happens before the phone rings, with every real caller still getting an answer.

How to stop spam calls on a business phone without missing customers

This is the setup we built SkipCalls for. You keep your existing number and forward calls to your SkipCalls receptionist (here are the Verizon, AT&T, and T-Mobile forwarding steps, or use the forwarding code generator). From there:

• About 9 million known spam numbers are stopped before your phone rings.
• Every other caller gets answered 24/7 by an AI receptionist that takes the details, answers common questions, and books the job on your calendar.
• You get a text summary of each call, so you decide what needs a callback without listening to voicemail.

Setup takes about 5 minutes, and nobody gets silenced. If junk calls are eating your business line, see plans and features.

FAQ

What is the fastest way to stop spam calls on iPhone?

Go to Settings > Apps > Phone and turn on Spam, then set Screen Unknown Callers to Ask Reason for Calling. Also turn on your carrier's free spam filter, since it blocks calls before they reach the phone.

How do I stop spam calls on Android for free?

Open the Phone app, tap the three dots > Settings > Caller ID and spam, and turn on Filter spam calls. On Samsung, turn on Caller ID and spam protection and Block spam and scam calls. Then enable your carrier's free tool (Call Filter, Scam Shield, or ActiveArmor).

Why do I still get spam calls after joining the Do Not Call list?

The registry only binds legitimate telemarketers. Scammers ignore it, and it doesn't block anything. It can also take up to 31 days for legal sales calls to stop after you register.

Does blocking a number stop spam calls?

Only from that exact number. Spam operations rotate and spoof numbers, so reputation-based filtering from your carrier or phone works far better than a growing personal block list.

What is the best call blocking app?

Start with the free tools built into your carrier and phone. If you still get many calls, choose an app with strong ratings, category blocking, and a privacy policy you're comfortable with, and turn it on under Call Blocking & Identification (iPhone) or set it as your caller ID and spam app (Android).

Should I answer spam calls to tell them to stop?

No. Answering or pressing a key confirms your number is active, which tends to increase calls. Let it go to voicemail and report the number at DoNotCall.gov.

How can a business stop spam calls without missing new customers?

Screen calls before they ring instead of silencing unknown numbers. An AI receptionist that blocks known spam numbers and answers everyone else keeps real leads coming in while the junk stays out.