How to Block Incoming Calls on Your Phone

Understanding Call Blocking Basics

Call blocking is a feature that lets you stop unwanted phone calls from reaching you. When you block a number, that caller cannot reach you through voice calls, though text messages and other contact methods may still come through depending on your phone type and settings. Most phones sold today have some form of call blocking built in, meaning you do not need to purchase additional software or services to use this feature.

The Federal Communications Commission (FCC) reported that Americans received over 3.7 billion unwanted calls in 2021. This number includes spam calls, robocalls, and scam attempts. Call blocking has become a standard tool for managing these interruptions. Whether you use an iPhone, Android phone, or other device, the basic principle remains the same: you identify a number you do not want to hear from, and your phone prevents that number from connecting to you.

It is worth understanding that call blocking works differently across different phone types and carriers. Some phones store blocked numbers only on the device itself, while others sync blocked numbers across multiple devices or through your carrier's network. Additionally, some blocking happens at the phone level (on your device), while other blocking happens at the carrier level (through your phone company's systems). Knowing which type of blocking you are using matters when troubleshooting problems or when switching phones.

Takeaway: Before you start blocking calls, understand that your phone likely already has this feature built in. You will not need to pay extra or install anything new. Simply locate the feature in your phone's settings or phone app.

Blocking Calls on iPhone

iPhone users have multiple built-in options for blocking unwanted calls. The most common method involves blocking a number directly from the Phone app. When you receive a call you want to block, you can decline it and then add it to your blocked list. To do this, open the Phone app, find the "Recents" tab at the bottom of the screen, locate the number or contact you want to block, and tap the information icon (a small "i" in a circle). Scroll down and select "Block this Caller," then confirm your choice.

You can also block numbers before they ever call you. If you have a contact saved in your phone and want to block that contact, open the contact, tap "Edit" in the upper right corner, scroll down, and select "Block this Caller." This method works for people already in your contacts list.

iPhones running iOS 13 or later include a feature called "Silence Unknown Callers" that automatically sends calls from people not in your contacts to voicemail. To turn this on, go to Settings, scroll down to Phone, and toggle on "Silence Unknown Callers." This does not block calls entirely, but it prevents your phone from ringing when unknown numbers call.

You can view your complete list of blocked numbers in the iPhone Settings app. Go to Settings, scroll to Phone, and tap "Blocked Contacts" to see everyone you have blocked. From this screen, you can unblock numbers if you change your mind. Each blocked number appears in a list you can manage at any time.

Takeaway: iPhone call blocking requires just a few taps in the Phone app. You can block callers you have already heard from, block saved contacts, or block all unknown callers using the "Silence Unknown Callers" feature. Your blocked list is always available to review in Settings.

Blocking Calls on Android Devices

Android phones also include native call blocking tools, though the exact steps vary slightly depending on which Android version you use and which manufacturer made your phone. Most Android phones block calls through the Phone app, which is where you manage your calls, contacts, and voicemail.

To block a call on most Android devices, open the Phone app and go to your call history or recents list. Long-press (hold down) on the number you want to block until a menu appears. Select "Block number" or "Block/report spam" from the options shown. Android will confirm that the number is blocked. You can unblock numbers at any time by going back to the Phone app and finding the blocked number in your call history, then selecting "Unblock."

Many Android phones also let you block calls directly from your contacts. Open your Contacts app, find the person you want to block, open their contact details, and look for a menu option (usually three dots) that includes "Block" or "Block contact." Select this option and confirm.

If your Android phone was made by Samsung, Google, or another major manufacturer, you may also find additional call filtering options. These often appear in the Phone app settings. Some Android phones include a "Spam protection" or "Call filter" feature that can block suspected spam calls automatically. You can usually turn this feature on or off in your Phone app settings.

Takeaway: Android call blocking typically involves long-pressing a number in your phone's call history or contacts, then selecting a block option. The exact menu language varies by phone model, but the process remains straightforward. Check your specific phone's documentation if the steps differ slightly from this description.

Using Carrier-Level Call Blocking

Beyond the call blocking built into your phone itself, your phone company (carrier) may offer call blocking services through their network. Major U.S. carriers like Verizon, AT&T, T-Mobile, and others have introduced call filtering and blocking tools that work at the carrier level. These services block calls before they reach your phone, rather than blocking them on your device.

Verizon offers a service called "Call Filter" that blocks robocalls and spam calls automatically. Some versions are free, while others require a monthly fee for advanced features. AT&T provides "Call Protect," which offers similar robocall and spam blocking. T-Mobile includes "Scam Shield" to help reduce unwanted calls. Each carrier's service works differently, so you should contact your carrier directly to learn what call blocking options are available for your specific plan.

To use carrier-level call blocking, you typically need to contact your phone company or download their specific app. Some carriers let you manage your blocked numbers through a website or mobile app, while others use automatic filtering that requires no action from you. Carrier-level blocking has advantages: it stops calls before they use your phone's resources, and it can block calls based on patterns that affect many customers, not just your personal list.

One consideration is that carrier-level blocking may not block numbers you personally want blocked—it focuses on known spam and robocalls. If you want to block a specific contact, your phone's built-in blocking feature will likely work better. However, using both your phone's blocking and your carrier's blocking together provides multiple layers of protection.

Takeaway: Contact your phone carrier to learn what call blocking options are available through their service. Carrier-level blocking can stop robocalls and spam before reaching your phone, but it works best when combined with your device's own blocking features for personal numbers.

Blocking Calls Through Third-Party Apps

If your phone's built-in call blocking or your carrier's services do not meet your needs, third-party apps in the Google Play Store or Apple App Store offer additional call blocking options. Popular apps include RoboKiller, Mr. Number, and Nomorobo. These apps use different technology and databases to identify and block unwanted calls, often including spam and robocalls that your phone might not recognize.

Third-party call blocking apps typically work by comparing incoming calls against large databases of known spam and scam numbers. When a call comes in from a number on the database, the app blocks it automatically. Many of these apps also let you add your own numbers to a personal blocked list. Some apps go further and attempt to identify scammers by name, preventing calls from similar patterns.

It is important to note that third-party apps vary in quality and effectiveness. Some charge subscription fees—often ranging from $2 to $10 per month—while others are free and supported by advertisements. Before installing any third-party app, review user ratings and read what permissions the app requests. Call blocking apps need permission to access your phone, contacts, and call history, which is normal for this type of app, but you should always verify that the app is from a trusted developer.

One advantage of third-party apps is that they often include features beyond simple blocking, such as call screening (the app answers and records the call to protect you) and reporting tools (you can report spam calls to help the app improve its database). However, these advanced features sometimes require payment.

Takeaway: Third-