How to Stop Spam Calls and Robocalls for Good

The phone rings with a number that looks almost exactly like yours. You answer, and it's a robocall about your car's extended warranty — again. Americans get more spam calls than almost anyone in the world, and no single switch turns them off. But a layered approach — built-in phone settings, carrier tools, the Do Not Call Registry, and a blocking app — can take most of the ringing out of your day.

Know your caller: the main types of spam calls

• Robocalls: pre-recorded messages. Some are legal (school closures, appointment reminders you consented to), but most telemarketing robocalls to your cell phone are not.
• Live telemarketing: energy plans, health insurance, solar panels, "final notice" offers.
• Neighbor spoofing: scammers display a number with your same area code and prefix so you're more likely to pick up. Sometimes they even mirror most of your own number.
• Impostor calls: someone claiming to be the IRS, Social Security, your bank, Medicare, or a federal agent demanding payment or information.

The number on your caller ID proves nothing. Spoofing is trivially cheap, which is why blocking a single number rarely helps for long.

The scam patterns worth recognizing

A few tells show up again and again:

• Urgency and threats: "arrest warrants," "suspended Social Security number," "your account will be closed today."
• Payment in gift cards, wire transfers, crypto, or payment apps: no legitimate agency or company takes payment that way.
• Requests for your SSN, bank login, or one-time codes: real institutions never ask for these over an incoming call.
• Caller ID that says "Washington, DC" or your bank's name: exactly the thing spoofing makes easy.

If a caller claims to be from your bank or a government agency, hang up and call back on the official number from the organization's website or the back of your card.

Blocking calls on Android

On most Android phones:

1. Open the Phone app.
2. Tap the three-dot menu and go to Settings.
3. Choose Blocked numbers.
4. Add numbers manually or toggle the option to block calls from unknown/spam callers if your phone offers it.

Google's Phone app also flags suspected spam before you answer and lets you report numbers, which improves filtering for everyone. Samsung and other makers offer their own call-spam protections under similar settings menus.

Blocking calls on iPhone

On iOS:

1. Open Phone → Recents.
2. Tap the ⓘ button next to the number.
3. Scroll down and choose Block this Caller.

Manage the list anytime under Settings → Phone → Blocked Contacts. Also consider Silence Unknown Callers (Settings → Phone), which sends calls from numbers not in your contacts straight to voicemail and lists them in your call history. Legitimate callers — doctors' offices, schools, contractors — can still leave a message.

Use your carrier's free tools

All four major US carriers offer free spam-blocking and caller-ID features:

• AT&T ActiveArmor and its call-blocking app.
• T-Mobile Scam Shield, including "Scam Block" (activate it by dialing #662# from your phone) and caller ID.
• Verizon Call Filter, with a free base tier and a paid Plus tier.
• Boost Mobile (formerly Sprint/Boost) offers similar protection through its app.

Check your carrier account or app for the exact names and settings; features change, but spam labeling and blocking are standard now. Some carriers let you mark which numbers should always get through.

Register and report

• Add your numbers to the National Do Not Call Registry at donotcall.gov. It stops legitimate telemarketers — the ones that follow the rules — from calling you. Scammers ignore it, which is itself a useful signal: a sales call after you're registered is a good candidate for a report.
• Report violations and fraud at reportfraud.ftc.gov, the Federal Trade Commission's reporting site. Reports feed real enforcement actions, including the crackdowns on robocall operations.
• You can also forward unwanted text messages to 7726 (SPAM) so your carrier can block the sender.

Add a dedicated blocking layer

Built-in tools block known offenders, but spoofers rotate through millions of numbers. Call-blocking apps such as NoCall add a real-time layer: incoming calls are checked against continuously updated spam and scam databases, and likely spam gets flagged or blocked before you pick up. For anyone getting several nuisance calls a day, this is usually the change you notice most.

A routine that works

1. Enable carrier spam blocking on your account.
2. Turn on Silence Unknown Callers (iPhone) or your Android phone's spam filter.
3. Register on donotcall.gov and report violators at reportfraud.ftc.gov.
4. Never confirm personal info on an inbound call — hang up and call back on the official number.
5. Use a blocking app for real-time coverage of new numbers.

None of these steps alone stops everything, but together they cut spam calls from a daily disruption to a rare, labeled, one-tap block.