Robocalls are still a massive problem, with 4.7 billion spam calls placed in January 2025 alone. But the good news? Call-blocking apps and carrier protections have never been better.
If you’re tired of your phone ringing with IRS scams, car warranty fraud, or fake bank alerts, it’s time to take action. In this guide, we’ll compare the best call-blocking apps, look at which phone carriers offer the best spam protection, and break down how new technology like STIR/SHAKEN is helping to stop robocalls at the source.
The Best Call-Blocking Apps of 2025
1. YouMail (Best Overall for Spam Blocking & Voicemail Protection)
Why it’s great:
✅ Blocks known spam numbers automatically
✅ Plays an “out of service” message to trick robocallers
✅ Identifies the type of spam call (IRS scam, insurance fraud, etc.)
✅ Protects your voicemail from spam and hacking attempts
✅ Works on both iOS and Android
Best for: Anyone who wants strong spam call protection plus voicemail security.
2. Robokiller (Another Option Call Answering)
https://www.youmail.com/home/compare/youmail-vs-robokiller
Features:
✅ Uses AI-powered call screening to answer calls and waste scammers’ time
✅ Blocks caller ID spoofing scams
✅ Includes funny “answer bots” that engage scammers in fake conversations
✅ Customizable spam filters
Best for: People who want spam filtering and customizable features.
3. Nomorobo (Good for Landlines)
https://www.youmail.com/home/compare/youmail-vs-nomorobo
Features:
✅ Works on landlines and VoIP phones (great for home phones)
✅ Stops robo-political calls and telemarketing spam
✅ Real-time scam call database updates
Best for: Homeowners and businesses who get spam calls on landlines.
4. Hiya (Carrier-Integrated Call Blocking)
https://www.youmail.com/home/compare/youmail-vs-hiya
Features:
✅ Used by AT&T, T-Mobile, and Samsung for spam detection
✅ Caller ID lookup for unknown numbers
✅ Custom blocking settings
Best for: People who want carrier-integrated spam protection.
5. Truecaller (Global Spam Protection)
https://www.youmail.com/home/compare/youmail-vs-truecaller
Why it’s great:
✅ Largest database of scam numbers worldwide
✅ Includes SMS spam filtering
✅ Community-driven spam call reporting
Best for: People who travel internationally or get a lot of spam texts.
Which Phone Carrier Offers the Best Spam Protection?
Most major carriers now offer built-in spam blocking, but some are better than others. Here’s how the top carriers compare:
1. AT&T ActiveArmor (Best Overall Carrier Protection)
- Automatically blocks suspected fraud calls
- Spam call warnings appear on caller ID
- Reverse number lookup available
- Free basic plan, or $3.99/month for extra features
More details: https://www.youmail.com/home/compare/youmail-vs-att
2. Verizon Call Filter (Best for Custom Spam Blocking)
- Auto-blocks known scam numbers
- Lets you create a custom block list
- Caller ID shows risk level of unknown calls
- Free basic plan, or $2.99/month for advanced features
More details: https://www.youmail.com/home/compare/youmail-vs-verizon
3. T-Mobile Scam Shield (Best Free Option)
- Free scam call blocking for all users
- Lets you screen unknown calls before answering
- Custom blocking for specific numbers
- Caller ID shows if a call is verified or likely spam
More details: https://www.youmail.com/home/compare/youmail-vs-t-mobile
4. Google & Apple Built-in Call Screening
Both Google Pixel phones and Apple iPhones now include built-in spam call detection:
- Google Pixel Call Screen lets Google Assistant answer and filter spam calls.
- Apple iOS Silence Unknown Callers sends unknown numbers straight to voicemail.
How STIR/SHAKEN is Helping to Stop Robocalls
One of the biggest breakthroughs in the fight against robocalls is STIR/SHAKEN, a technology that:
- Authenticates caller ID information to prevent spoofing
- Flags suspicious calls before they reach your phone
- Helps carriers block scam calls at the network level
How It Works
- When a call is placed, the caller’s number is verified by the phone carrier.
- The call is checked against a scam call database.
- If it’s verified, the call goes through. If it’s suspicious, it’s flagged or blocked.
Thanks to STIR/SHAKEN, caller ID spoofing is much harder, which means:
✅ Fewer fake IRS and Social Security scam calls
✅ More accurate spam warnings on your phone
✅ Better overall call security for mobile users
More details: https://www.fcc.gov/call-authentication
Final Verdict: Who is Winning the Fight Against Robocalls?
While robocallers are getting smarter, spam-blocking technology is catching up fast.
Best Call-Blocking App: YouMail (https://www.youmail.com/)
- Best for blocking robocalls, protecting voicemail, and avoiding scams
Best Carrier Spam Protection: T-Mobile Scam Shield (https://www.youmail.com/home/compare/youmail-vs-t-mobile)
- Best free carrier spam blocking option
Most Important Technology: STIR/SHAKEN (https://www.fcc.gov/call-authentication)
- Helps prevent caller ID spoofing and scam calls at the network level
What Can You Do to Stop Robocalls?
✅ Download a spam-blocking app like YouMail
✅ Enable your carrier’s free spam filters
✅ Don’t answer unknown calls—let voicemail handle it
✅ Report scam calls to the FTC: https://reportfraud.ftc.gov/
Robocalls may never disappear completely, but with the right tools, you can block most of them before they ever reach your phone.
Have you tried a call-blocking app or carrier spam protection? Share your experience in the comments!
