How to Block Spam Calls and Texts on Android

By Auraz Tech Editorial Team | October 2026

Robocalls at dinner, "your parcel is held" texts at midnight, fake bank alerts that look just real enough to make your stomach drop — spam calls and texts have gone from annoying to genuinely dangerous. The good news is that Android already ships with powerful spam-fighting tools, your carrier probably offers free ones too, and a few smart habits can cut the volume dramatically. We tested every method below on real phones. Work through them in order and your phone will get noticeably quieter within a day.

1. Turn On Google's Built-in Spam Protection

This is the single highest-impact step and most people haven't enabled it. If your phone uses Google's Phone app (Pixels and many Motorola, Nokia, and OnePlus phones do), it includes a spam database that warns you — or silently filters — known robocallers:

1. Open the Phone app and tap the three-dot menu, then Settings.
2. Tap Caller ID & spam (on some phones it's under Spam and Call Screen).
3. Turn on See caller and spam ID — suspected spam calls will show a red warning.
4. Turn on Filter spam calls — the worst offenders never even ring; they go straight to voicemail or are declined silently.

This protection is free, works on-device, and improves as Google's database grows. On Pixel phones, also explore Call Screen, which has Google Assistant answer unknown callers and transcribe what they want in real time — legitimate callers state their business, robocalls hang up. It's the closest thing to a spam-call force field that exists.

2. Block Individual Numbers — and Know What Actually Happens

For the persistent number that keeps slipping through filters, manual blocking still works:

1. In the Phone app, long-press the number in your recent calls.
2. Tap Block (or Block / report spam) and confirm.
3. You can also block from Contacts: open the contact, tap the menu, and choose Block numbers.

Blocking a number stops both calls and texts from it — Android treats a blocked number as blocked across both. The limitation: spammers spoof caller ID and rotate through thousands of numbers, so blocking one number is whack-a-mole against an organized campaign. Treat manual blocking as cleanup for repeat offenders, not your main defense. The filters in the steps above do the heavy lifting.

3. Send Unknown Callers Straight to Voicemail

If your work doesn't depend on answering unknown numbers, this one change eliminates most interruptions. Two approaches:

• Filter spam calls (from step 1) sends only numbers Google is confident are spam to voicemail, letting unknown-but-possibly-legitimate calls through.
• Do Not Disturb with exceptions goes further: enable DND on a schedule (say, overnight), and under Settings > Sound & vibration > Do Not Disturb > People, allow calls from Contacts only or Starred contacts only. Everything else stays silent but still leaves voicemail.

On Samsung phones, there's a dedicated toggle: Phone app > Settings > Block numbers > Block unknown/private numbers. Combine it with the Smart Call feature in step 6 for the strongest Samsung setup.

4. Use Verified Calls to Spot Real Businesses

One reason spam works is that real calls from your bank, courier, or clinic also come from unknown numbers. Google's Verified Calls feature fixes this: participating businesses verify their identity with Google, and when they call you, your Phone app shows the company name, logo, and reason for the call with a verification badge. Enable it in the Phone app under Settings > Caller ID & spam (or Verified Calls directly). When a call shows the verified badge, you can answer with confidence; when an "urgent bank call" shows no badge, that's your cue to hang up and call the bank yourself on their official number.

5. Stop Spam Texts in Google Messages

Spam texts (smishing) are where the real theft happens — fake parcel links, bank alerts, and "account suspended" messages designed to steal logins. Lock down your messaging:

1. Open Google Messages, tap your profile icon, then Messages settings > Spam protection, and turn it on. Suspicious texts are filtered automatically.
2. When a spam text arrives, open the conversation, tap the three-dot menu, and choose Block, then tick Report spam before confirming. Reporting feeds the shared spam database.
3. Never tap links in unexpected texts — even to "unsubscribe." Open the company's official app or website manually instead.

Most carriers also support reporting by forwarding the message to 7726 (spells SPAM). It takes five seconds and helps the carrier block the sender network-wide.

6. Samsung Galaxy Owners: Turn On Smart Call

Samsung phones use their own system, powered by Hiya's spam database, called Smart Call:

1. Open the Phone app and tap the three-dot menu, then Settings.
2. Tap Caller ID and spam protection and turn it on.
3. Choose whether to block high-risk calls automatically or just show the warning — "Block" is quieter, "Alert" is safer if you worry about missing legitimate calls.

Samsung's system also flags suspected spam in text messages in the Samsung Messages app. If your Galaxy is set to Google's Phone and Messages apps instead of Samsung's, follow the Google steps above — don't try to run both systems at once.

7. Use Your Carrier's Free Spam Tools

Your mobile carrier sees spam patterns across millions of lines and most now offer free blocking tools — check your carrier's app or website to activate them:

• T-Mobile includes Scam Shield free: scam ID, scam block, and a free proxy number.
• AT&T offers ActiveArmor with free spam and fraud call blocking.
• Verizon includes Call Filter free with spam detection and blocking.
• In Pakistan, all major networks (Jazz, Telenor, Zong, Ufone) let you block promotional and spam messages — check your carrier's app or helpline for their DND/spam-blocking service, and report persistent spam to the PTA.

Carrier-level blocking is powerful because it can stop calls before they ever reach your phone. The free tier is enough for most people; paid tiers mostly add fancier caller ID and reverse lookup.

8. Try a Third-Party Spam Blocker

If built-in tools aren't enough, dedicated apps bring bigger spam databases and community reporting. The most established options:

• Truecaller — the largest caller-ID database in the world, excellent at identifying spam in South Asia and the Middle East. Free with ads.
• Hiya — clean interface, strong US/European database, powers Samsung's Smart Call.
• Should I Answer — community-rated numbers with offline database options.
• RoboKiller — aggressive blocking plus "answer bots" that waste spammers' time. Paid.

One caution before installing: these apps need deep permissions (call logs, contacts, SMS) to work, and some free ones monetize that data. Truecaller uploads your address book to build its directory unless you opt out and delist your number on their website. Read the privacy policy, grant only the permissions the app genuinely needs, and prefer the built-in Google/Samsung/carrier filters if privacy is your priority.

9. Report Spam — It Actually Helps

Reporting feels pointless in the moment, but it's how the databases learn. Every report trains the filters that protect everyone:

• In the Phone app, report from the call log when you block a number.
• In Google Messages, tick Report spam when blocking a text.
• Forward spam texts to 7726.
• File a complaint with your telecom regulator — the PTA in Pakistan, the FTC in the US — for aggressive or fraudulent campaigns.

Also tell the impersonated company. Banks and couriers have fraud teams that take down fake numbers and domains fast when customers report them — and they'll confirm whether a message you received was really from them.

10. Reduce Future Spam: Stop Your Number From Leaking

Blocking treats the symptoms; this treats the cause. Spammers get numbers from data breaches, public listings, and forms:

• Keep your number off public profiles — social media bios, marketplace listings, and forum signatures are harvested by bots.
• Use a second number for signups — a free VoIP number or dual-SIM second line for shopping sites, contests, and app registrations keeps your real number clean.
• Skip "free prize" and survey forms that demand your phone number — the prize is your number being sold.
• Check breach sites to see if your number leaked in a known breach, and be extra skeptical of calls referencing real details about you — scammers weaponize leaked data to sound legitimate.

You can't un-leak a number that's already out there, but every new signup is a choice. A number that's never handed out gets dramatically less spam within a few months.

11. What to Do If a Scammer Already Got Through

It happens to careful people — scammers are professionals. If you answered, shared something, or clicked a link:

1. Hang up immediately — don't try to argue or "verify" anything with the caller.
2. Block and report the number using the steps above.
3. If you shared bank details or a one-time code, call your bank's official helpline right away — minutes matter for stopping fraudulent transactions.
4. Change passwords for any accounts you mentioned or logged into via a suspicious link, and enable two-factor authentication.
5. Watch your accounts for unfamiliar transactions over the next few weeks.

Don't feel embarrassed — report it anyway. Scammers rely on shame keeping victims quiet.

What Doesn't Work (Don't Bother)

• Answering to ask them to stop: answering confirms your number is live and typically increases calls. Legitimate telemarketers honor removal requests; criminals add you to a "sucker list."
• Pressing 1 to unsubscribe: on a scam call, this just confirms a human answered. Hang up instead.
• Calling unknown numbers back: some missed calls are "Wangiri" scams from premium-rate numbers — calling back can cost you real money per minute.
• Do-not-call registries alone: they reduce legitimate telemarketing, but scammers operating illegally ignore them entirely. Registries help; they don't replace blocking and filtering.
• Replying STOP to scam texts: real companies honor opt-outs, but replying to a smishing text confirms your number is active. Block and report instead.

FAQ

Why am I suddenly getting so many spam calls?

Your number likely leaked through a data breach, a public listing, or a form you filled in online. Spammers also use auto-dialers that call every number in a range. Blocking helps with the calls you already get, but reducing where your number appears online is what slows new ones down.

If I block a number, does it also block their texts?

Yes. On Android, blocking a number in the Phone app or Contacts blocks both calls and SMS/RCS messages from that number. The catch is that spammers constantly rotate spoofed numbers, so blocking one number rarely stops the campaign — use spam filtering on top of manual blocking.

Is it safe to answer a spam call just to tell them to stop calling?

No — answering confirms your number is active and usually increases the calls. Never press 1 to unsubscribe, never call the number back, and never share personal details or verification codes. The safest move is to hang up immediately, block the number, and report it.

Do spam-blocking apps sell my data?

Some free ones do monetize call and contact data, so read the privacy policy before installing. Truecaller, for example, uploads your contacts to build its directory unless you opt out. If privacy matters to you, stick with the built-in Google or Samsung filters and your carrier's free tools first.

What should I do if I already answered a scam call?

Hang up right away and block the number. If you shared any personal details, bank information, or a one-time code, call your bank immediately and change the affected passwords. Then report the number in your Phone app and to your telecom regulator so the pattern gets flagged.

Auraz Tech Editorial Team — we test every guide on real devices and keep our tutorials updated.