New AI Tools That Block Fake Phone Calls Before They Start

Know what's available before you start

You have up to three layers of scam call protection available:

1. Built into your phone's operating system — iOS and Android both have native call screening tools you can turn on right now
2. From your phone carrier — most major carriers offer free spam-call databases and blocking at the network level
3. Third-party apps — optional add-ons if you want extra control or a log of blocked calls

You don't have to use all three, but each layer catches calls the others miss. Starting with what's already on your phone costs nothing and takes under two minutes.

Turn on iPhone's built-in call protection

iPhone has two main tools for reducing scam calls.

Silence Unknown Callers sends calls from numbers not in your contacts, email, or recent calls directly to voicemail — without ringing your phone at all. To enable it:

1. Open Settings
2. Tap Phone
3. Tap Silence Unknown Callers and toggle it on

If silencing all unknown callers feels too aggressive, a middle option is to let those calls ring but commit to only checking them after they go to voicemail. Real callers leave messages; scammers almost never do.

Turn on Android's Call Screen

Many Android phones include a Call Screen feature where an AI assistant answers a call first and shows you a live transcript of what the caller says. You then decide whether to pick up, without the caller knowing you're watching.

On most Android phones:

1. Open the Phone app
2. Tap the three-dot menu and go to Settings
3. Look for Spam and Call Screen or Caller ID and Spam
4. Enable Filter spam calls or Screen calls automatically

Samsung phones have a similar feature under a different name. Look in your Phone app's settings for a spam or unknown caller protection option.

Activate your carrier's free spam protection

Your phone carrier maintains large databases of known scam numbers and can block or flag them before a call even reaches your device. Here's how to access this for major US carriers:

• AT&T — ActiveArmor is available as a free app and blocks known fraud calls automatically
• Verizon — Call Filter is free for basic protection; a paid tier adds a personal spam lookup feature
• T-Mobile — Scam Shield includes free caller ID and scam-blocking features built into the account
• Other carriers — Search your carrier's website for "call protection" or "spam blocking"

These carrier tools work at the network level, so they can catch calls before they even touch your phone's operating system — a different layer from the on-device tools in steps 2 and 3.

Add an optional third-party app for extra coverage

If you want more control — like a visual log of all blocked calls, or the ability to report new scam numbers yourself — free apps like Hiya or Should I Answer add a layer beyond what carriers provide.

These apps work by crowdsourcing reports from millions of users, so they often catch newly active scam numbers faster than carrier databases get updated.

One privacy note: these apps may upload your contact list or call log to their servers to provide caller ID. Review the app's privacy policy before installing if that matters to you.

Block repeat offenders individually

For numbers that keep getting through despite everything, you can block them one at a time directly on your phone:

• iPhone: Open the Phone app, tap Recents, tap the info icon next to the number, scroll down and tap Block this Caller
• Android: Open the Phone app, tap Recents, long-press the number, and tap Block / report spam

This won't stop scammers who rotate through new numbers constantly, but it's effective against numbers that call repeatedly from the same source.