Your phone buzzes. A number you don't know. Maybe it's the dentist, maybe it's a robot wanting to talk about your car's extended warranty. The good news is that an Android phone in 2026 already has most of the tools to cut this noise down to almost nothing, and they're free. This guide walks through the settings on Pixel and Samsung phones, the free apps your carrier offers, what to do when something slips through, and a few things people try that quietly make it worse. Grab your phone and let's turn the volume down.
Switch on the spam filtering that ships with your phone first. It costs nothing and does the heavy lifting. The wording depends on who made your phone, so here are both paths.
On a Google Pixel (and most phones using the Phone by Google app):
On a Samsung Galaxy (One UI):
One quirk: on a brand-new Samsung this menu may not appear until the phone pulls down a "Security Provider" update. If you don't see Caller ID and spam protection, update your software (Settings, then Software update) and check again. To compare standalone caller-ID tools, our roundup of the best caller ID apps for Android goes deeper.
Call Screen is a Pixel feature where the Google Assistant answers an unknown call for you, asks who's calling and why, and shows a live transcript. You read it and decide whether to pick up. Scammers and robots tend to hang up the moment they hit it, which is the point. It isn't on by default, so turn it on:
If you get a lot of unwanted calls, start at Maximum for a week. If it catches the occasional real caller (a delivery driver from an unknown number, say), drop to Medium. On eligible Pixels you may also see real-time scam alerts: during a live call, if the conversation shows patterns common to scams, the phone quietly warns you. That analysis runs on the device, and Google says the call content isn't sent to its servers unless you share it.
Samsung phones don't have Call Screen in this form; the closest equivalent is the aggressive auto-block setting above.
Calls are only half the problem. Google Messages, the default texting app on Pixel and many other Android phones, has its own filter that runs separately from the call settings.
This is usually on already, but confirm it. When active, the app uses on-device machine learning (pattern-matching that happens on your phone, not a server) to spot known spam. If a message contains a link, the app may send that single URL to Google to check it isn't malicious.
Since March 2025, Google Messages also includes Scam Detection, which watches for conversational scams that start friendly ("Hi, is this Sarah?") before steering toward a fake investment or a gift-card request. It targets crypto cons, fake toll and billing notices, package-redelivery fees, and tech-support tricks. It only looks at messages from people not in your contacts, and again the processing stays on your device. Its switch lives in the same Spam protection menu. Samsung Messages users get similar filtering through the carrier and Hiya tools instead.
Your phone company runs its own spam-blocking at the network level, often before a call reaches your handset, and the basic version is free. They catch things the phone's own filter can't, so install yours.
Because carrier blocking happens on the network, your screen may stay dark for the worst offenders. Turn on automatic blocking inside whichever app you have for a free second layer. If you'd rather use an independent tool, see our look at the best call blocker apps for Android.
No filter is perfect, so you'll still see the occasional unwanted call or text. Reporting it stops that sender reaching you again and feeds the shared databases that protect everyone else. It takes five seconds.
To block and report a call (Phone by Google):
To block and report a text (Google Messages):
Reporting a text in Google Messages sends the sender's number plus the last several incoming messages to Google to sharpen detection, then files the thread under "Spam & blocked." Samsung is nearly identical: open or long-press the message, then choose Block number and the report option.
One more free move works on any Android phone, regardless of carrier. Forward the spam text to 7726 (that spells SPAM on the keypad), which sends a copy straight to your carrier's fraud team. The GSMA, the global mobile industry body, reserved 7726 and made it toll-free, so it never counts against your plan. To do it: open the message, press and hold the text bubble, tap Forward, type 7726, and send. Verizon texts back asking for the originating number; reply with it. T-Mobile and AT&T usually confirm automatically. When enough people flag the same sender, carriers can label or block it network-wide.
Blocked your kid's new number by mistake? In the Phone app, open the call in your history, tap it, and choose Not spam or Unblock to undo it.
Here's the one that trips up almost everyone. A scam text ends with "Reply STOP to unsubscribe," and the instinct is to do it. Don't, at least not with senders you don't recognize.
Legitimate businesses you signed up with (your pharmacy, your bank, a store you bought from) do honor STOP, and replying is fine. But a scammer doesn't care about your wishes. To them, any reply is a gift: it confirms a real person reads this number, which makes you more valuable and usually brings more spam, not less. The FTC is blunt about this. With a suspicious text, don't reply at all; block and report it using the steps above, then delete it.
The same logic applies to calls. Don't press 1 "to be removed," and don't speak or say "yes" to a recording. Pressing a key or making a sound tells the system a human answered, and your number gets sold on. With an unknown call, the calm choices are: let it go to voicemail, screen it on a Pixel, or hang up without a word.
The National Do Not Call Registry is a free, permanent way to tell legitimate US telemarketers to leave you alone. It's worth doing, but understand what it can and can't do.
The catch: it is a list that law-abiding companies agree to honor, not a blocker, and it has no effect on scammers, who are already breaking the law by calling you. Charities, political groups, debt collectors, and companies you do business with can also still call. So think of it as a way to silence honest salespeople, while the phone settings and carrier tools above handle the dishonest ones. If a real telemarketer keeps calling after 31 days, file a complaint through the same site.
You'll see apps like Truecaller, Hiya, RoboKiller, and Nomorobo advertised as the answer, often $2 to $5 a month or roughly $30 to $50 a year. Worth it? For most people in 2026, no, not as a first step. The free combination of your phone's built-in filter plus your carrier's app catches the large majority of junk at no cost.
That said, a third-party app can help in a couple of cases: if you get heavy spam and want a much larger crowd-sourced caller-ID database, or you want features like RoboKiller's answer bots that waste a scammer's time. Weigh the trade-offs first. Many of these apps want your call log and contacts, and some have a history of uploading address books, a privacy cost worth taking seriously. Read the permissions before installing, and prefer a paid tier over a "free" one funded by selling data. Our review of the Truecaller app and its key features walks through that balance, and you can compare options in our caller ID app guide. Set up the free tools first, and only pay if real spam still gets through after two weeks.
Settings handle the calls you already get. These habits slow down how many new ones start.
If your worry is broader than spam, our guides to the best antivirus apps for Android and the best app lock apps for Android cover the rest, and you'll find calmer texting options in our messaging app roundup.
The steps above were checked against official guidance: Google Pixel Help: spam & scam detection, Google Phone app Help: caller ID & spam protection, Google Messages Help: report spam, the FTC on recognizing and reporting spam texts, and the National Do Not Call Registry.
A few slip through because scammers constantly switch numbers, often spoofing local ones so the call looks like a neighbor. Filters catch known bad numbers, but a brand-new spoofed one hasn't been reported yet. Keep blocking and reporting the ones that get through, set your Pixel's Call Screen to Maximum or your Samsung to block all spam and scam calls, and make sure your carrier app's automatic blocking is on. The volume drops sharply over a few weeks.
No. With an unknown or suspected-spam call, answering, speaking, or pressing a key to "opt out" tells the system a real person is on this line, and your number becomes more valuable. Let unknown calls go to voicemail or screen them. If it's important, a real caller will leave a message or you can call the company back using a number you look up yourself.
Yes, more than most people expect. Forwarding to 7726 sends a copy to your carrier's fraud team, which analyzes the sender and any links. When enough customers flag the same number, the carrier can block it across its whole network, protecting people who never reported it. It's free, it doesn't count against your plan, and it's one of the more useful five-second actions you can take.
It stops that exact number, but most spammers rotate through many, so a new one can appear the next day. Blocking is still worth doing, and pairing it with the report option feeds the shared databases that filter future numbers automatically. Think of it as closing one door while your phone's filter and carrier tools watch the others.
For most people, no. The free filter built into your phone plus your carrier's free app (Scam Shield, Call Filter, or ActiveArmor) handles the large majority of junk. A paid app can help if you get unusually heavy spam or want extras like time-wasting answer bots, but check what data it collects first, since some want full access to your contacts. Set up the free tools and only pay if spam is still a real problem after a couple of weeks.
That's called neighbor spoofing. Scammers fake the first six digits of your number so the call looks local and familiar, hoping you'll pick up. The number on your screen is not the real source and often isn't a working line at all, so calling it back rarely reaches anyone. Don't trust a call just because the area code matches yours; let the filter and Call Screen judge it instead.