Learn About Blocking Telemarketer Calls Guide

Understanding Telemarketer Calls and Why They're a Problem

Telemarketer calls are one of the most common sources of unwanted contact in American homes. According to the Federal Trade Commission (FTC), Americans received approximately 3.7 billion robocalls in 2022, with a significant portion being telemarketing calls. These calls interrupt daily life, waste time, and can sometimes lead to scams that cost people money. Understanding what telemarketer calls are and why they happen is the first step toward protecting yourself.

Get Your Free Guide to State Property Tax Rates →

Telemarketer calls come from companies trying to sell products or services, conduct surveys, or collect debts. Some are legitimate businesses following the rules, while others operate outside the law. The problem has grown because technology makes it cheap to call thousands of people at once. Scammers also use telemarketing as a way to steal personal information or money. Robocalls—automated calls that play a recorded message—have made the problem worse. Many people receive dozens of unwanted calls each month.

The impact goes beyond annoyance. Telemarketer calls create stress and waste valuable time. Seniors and vulnerable people are often targeted by telemarketing scams. Some people lose thousands of dollars to fraudulent telemarketers. Even when the call isn't a scam, repeated interruptions affect productivity and quality of life. Understanding the scope of the problem helps explain why learning blocking methods matters.

Different types of telemarketer calls require different responses. Calls about extended car warranties, credit card offers, and debt collection are extremely common. Charity requests, political surveys, and health-related product pitches also flood phone lines. Some calls use caller ID spoofing to hide their real number or make it seem like the call comes from a local number or trusted organization. Recognizing these patterns helps you respond appropriately.

Practical Takeaway: Telemarketer calls are widespread and growing. Knowing the types and sources of these calls helps you decide which blocking methods work best for your situation.

How Phone Company Do-Not-Call Tools Work

Most phone companies offer built-in tools to reduce unwanted calls. These tools use technology to identify and filter out calls that match patterns of telemarketer behavior. AT&T, Verizon, T-Mobile, and other major carriers provide these services at no additional cost. Understanding what these tools do—and what they don't do—helps you use them effectively.

Get Your Free Illinois Real ID Information Guide →

Call filtering works by examining incoming calls against databases of known spam numbers, suspicious patterns, and robocall sources. When a call matches these patterns, the phone company can block it automatically or send it to a separate voicemail folder. Some tools use artificial intelligence to learn which calls are unwanted based on your behavior. If you reject a call or don't answer, the system may learn to block similar calls in the future. This approach catches patterns that humans might miss.

AT&T offers Call Protect, which comes free to most customers. Verizon provides Call Filter at no cost for basic features, with more advanced blocking available for a small monthly fee. T-Mobile includes Scam Shield in its service. U.S. Cellular, Cricket, and other carriers have similar offerings. To use these tools, you typically don't need to do anything special—they work in the background. However, you can usually adjust settings through your phone's settings menu or the carrier's website to control how aggressively calls are blocked.

These tools have limitations. They cannot block every unwanted call, especially new numbers that haven't been flagged yet. If a telemarketer uses spoofing technology to hide their real number, the tool may not catch it. Some legitimate calls might be blocked by mistake, meaning you could miss important messages. Elderly people or those unfamiliar with technology may find the settings confusing. Despite these limits, phone company tools are a strong first defense and cost nothing to use.

Practical Takeaway: Contact your phone company to learn what call-blocking tools they offer and how to turn them on. These tools work automatically to filter many telemarketer calls.

Using Your Phone's Built-in Blocking Features

Modern smartphones include built-in features that let you block specific numbers and set filtering rules. Both iPhones and Android phones offer blocking technology that works directly on your device. These features complement carrier-level tools and give you personal control over which calls reach you. Learning to use these tools takes only a few minutes.

Your Free Guide to Finding Train Travel Deals →

On iPhones, you can block calls and texts from specific numbers through the Phone app. Open a recent call from a telemarketer, tap the "i" icon, scroll down, and select "Block this Caller." The number goes into your blocked list, and future calls from that number won't ring through—they'll be sent directly to voicemail. You can also silence calls from unknown numbers by going to Settings, Phone, and enabling "Silence Unknown Callers." This feature sends calls from numbers not in your contacts to voicemail automatically. For text messages, similar blocking options exist through the Messages app.

Android phones offer comparable features through the Phone app or Google Phone (if available on your device). Open the call log, long-press on a telemarketer number, and select "Block number." The call will be sent to voicemail in the future. Android also allows you to block calls from unknown numbers, though the exact steps vary by phone manufacturer and version. Samsung, Motorola, and other Android makers include their own blocking apps with similar functionality.

These built-in tools work well for specific numbers you've already received calls from. However, they don't work retroactively on new numbers you haven't encountered yet. If a telemarketer calls from five different numbers, you'd need to block each one separately. This approach takes time but remains necessary for persistent callers. The advantage is that you control the blocking directly without relying on a third party.

Practical Takeaway: Block specific telemarketer numbers immediately after they call. On iPhone, use the Phone app; on Android, use the Phone or Google Phone app. For unknown callers, enable settings to send them to voicemail.

Third-Party Apps and Services for Call Blocking

Beyond phone company and phone manufacturer tools, specialized call-blocking apps provide additional protection. These apps use databases of known spam numbers, machine learning, and community reporting to identify and stop unwanted calls. Popular options include RoboKiller, Mr. Number, Call Control, and Nomorobo. Some of these apps are free, while others charge a monthly subscription for advanced features. Understanding how they work helps you decide if you need additional protection beyond standard tools.

Get Your Free Protein Nutrition Guide →

RoboKiller uses audio fingerprinting technology to identify robocalls and blocks them before they reach you. The app learns from millions of reported calls to recognize patterns in telemarketing and scam calls. A free version offers basic blocking, while a paid subscription adds features like call recording and detailed analytics about blocked calls. Mr. Number uses community reports and a database of spam numbers to filter calls. Users can report numbers to help the app improve its blocking accuracy. Call Control from AT&T works similarly but integrates with AT&T service if you use that carrier.

Nomorobo focuses specifically on robocalls and has partnerships with phone companies and the FTC. It works by checking incoming calls against a constantly updated database of known robocall sources. The service is free for home phone service but charges a subscription fee for mobile phones. These apps vary in effectiveness, with success rates ranging from 80 to 95 percent for known robocalls, but they're less effective at catching new telemarketing numbers or sophisticated spoofing attempts.

When choosing a third-party app, consider privacy and security. Some apps require access to your contacts, call history, and location data. Before installing an app, read its privacy policy to understand what information it collects. Check user reviews and ratings to see if the app truly reduces unwanted calls or causes problems with legitimate calls. Be cautious of apps that claim to block all calls or guarantee 100 percent success—no blocking method is perfect. Free apps may support themselves through advertising, which you should consider when choosing.

Practical Takeaway: Third-party apps provide an additional layer of protection beyond your phone company and phone settings. Choose one based on your needs, but understand that no app blocks every unwanted call perfectly.

The National Do Not Call Registry and Legal Protections

The Federal Trade Commission (FTC) operates the National Do Not Call Registry, a program that lets you request that telemarketers stop calling you. Registering your phone number on this

Learn About Local Affordable Housing Options →