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TipsMay 6, 2026

Effective Strategies to Block Warranty Spam Calls in the U.S.

By The Robokiller Team

Effective Strategies to Block Warranty Spam Calls in the U.S.

Receiving unsolicited warranty spam calls is a common nuisance in the United States. These calls often claim your vehicle's warranty is expiring or offer extended coverage, aiming to collect personal information or payments. To effectively block these unwanted calls, consider the following strategies:

What Are Warranty Spam Calls?

Warranty spam calls are unsolicited communications from individuals or organizations claiming to offer extended warranties or inform you about the expiration of your current vehicle warranty. These calls often pressure recipients into providing personal information or making payments for services that may not exist.

How Can Carrier Services Help Block Spam Calls?

Many U.S. carriers offer built-in features to help identify and block spam calls:

  • AT&T Call Protect: This service displays a "V" (for verified) on your caller ID for legitimate calls and blocks potentially fraudulent ones by giving a busy signal. It also categorizes spam calls as Political, Nonprofit, Telemarketer, Survey, or Robocaller. (consumerreports.org)

  • T-Mobile Scam Shield: T-Mobile provides Scam ID and Scam Block features. Scam ID identifies and tags suspicious calls, while Scam Block proactively blocks calls before they ring. Customers can activate these services by dialing #ONI# (#664#) for Scam ID and #ONB# (#662#) for Scam Block. (consumerreports.org)

  • Verizon Call Filter: Verizon's Call Filter detects spam and blocks high-risk calls. Eligible customers are automatically enrolled in the free version, while Call Filter Plus offers more robust protection for a monthly fee. (consumerreports.org)

What Are the Best Third-Party Apps to Block Spam Calls?

Several third-party applications offer advanced features to block spam calls:

  • Robokiller: Robokiller uses artificial intelligence to block 99% of spam calls and texts. It features customizable spam filters and answer bots that engage scammers, wasting their time and preventing them from reaching you. (robokiller.com)

  • Hiya: Hiya provides real-time caller ID and spam protection by identifying and blocking potential spam calls. It integrates with carriers like AT&T and T-Mobile, offering seamless protection. (blog.youmail.com)

  • Truecaller: Truecaller identifies unknown numbers and automatically flags potential spam calls. It offers real-time caller ID and spam protection, working with your phone's default app. (avnexo.com)

How Do Device-Based Call Blockers Work?

For landline users, device-based call blockers can be an effective solution:

  • CPR Call Blocker: This device connects to your landline phone and blocks unwanted calls at the touch of a button. It is compatible with all landline phones, providers, and VOIP networks. (callblockerusa.com)

  • CallShield Pro: An advanced call blocking device that offers free express shipping, a 30-day money-back guarantee, and a one-year warranty. It includes a companion app for iOS and Android and provides 24/7 customer support. (callshieldpro.org)

How Can You Report and Block Spam Calls?

Reporting spam calls helps authorities track and take action against scammers:

  • Federal Trade Commission (FTC): You can report unwanted calls to the FTC through their website. This helps in building cases against fraudulent callers.

  • National Do Not Call Registry: Registering your number can reduce the number of unsolicited calls you receive. While it doesn't eliminate all spam calls, it can decrease their frequency.

What Are Additional Tips to Prevent Spam Calls?

  • Avoid Sharing Personal Information: Do not provide personal or financial information over the phone unless you are certain of the caller's identity.

  • Be Cautious with Unknown Numbers: If you receive a call from an unknown number, let it go to voicemail. Legitimate callers will leave a message.

  • Educate Yourself and Others: Stay informed about common scam tactics and share this knowledge with friends and family to help protect them as well.

By implementing these strategies, you can significantly reduce the number of warranty spam calls you receive, enhancing your privacy and peace of mind.

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