Step-by-step instructions to block unwanted callers on iPhone, Android, and landline phones so you can take control of your phone privacy.
Unwanted calls can be more than just an annoyance—they can interrupt important moments, waste your time, and potentially expose you to scams. Fortunately, modern phones come equipped with powerful call blocking features that can help you filter out nuisance callers.
This guide provides detailed, step-by-step instructions for blocking unwanted calls on the most common phone systems: iPhones, Android devices, and traditional landlines. Whether you want to block a single persistent caller or set up more comprehensive protection, you'll find the specific steps for your device.
Remember: Call blocking is your right. In the UK, you are fully entitled to decide who can and cannot contact you by phone. These features are built into your devices specifically to help protect your privacy.
Apple's iOS provides several built-in methods to block unwanted callers. Here's how to use them effectively:
This powerful feature automatically sends calls from unknown numbers to voicemail, while allowing calls from your contacts, recent outgoing calls, and Siri Suggestions to ring normally.
Important Note:
When "Silence Unknown Callers" is enabled, calls from numbers not in your contacts will be silenced, sent to voicemail, and appear in your recent calls list. This may include legitimate calls from doctors' offices, delivery services, or other important callers not in your contacts.
Focus mode allows you to create custom call filters that activate during specific times or situations.
To view, edit, or unblock numbers:
Android phones offer powerful call blocking capabilities, although the exact steps may vary slightly depending on your Android version and phone manufacturer (Samsung, Google Pixel, OnePlus, etc.). We'll cover the most common approaches:
Android Variation Note:
Android phone interfaces vary by manufacturer and model. If these exact steps don't match your phone, look for similar options in your Phone app settings. The feature names may be slightly different, but the functionality is typically available on all Android phones.
Landline phones also offer call blocking options, though they vary by service provider and the type of phone you have. Here are the most common approaches for UK landlines:
Many modern DECT (Digital Enhanced Cordless Telecommunications) phones have built-in call blocking. Common brands include BT, Panasonic, and Gigaset.
BT's free service for landline customers that diverts known nuisance calls to a junk voicemail.
For older landline phones without built-in call blocking, you can purchase standalone call blocking devices that connect between your phone and the wall socket.
Landline Tip:
For the most comprehensive protection on landlines, combine the free services from your provider (like BT Call Protect) with a modern phone that has built-in call blocking features. This creates two layers of defense against nuisance calls.
Use third-party apps like Truecaller or Hiya, as iOS doesn't have a built-in feature to block all private numbers.
Most Android phones allow blocking private numbers in Phone app > Settings > Block numbers > "Block unknown/private numbers" option.
Many providers offer Anonymous Call Rejection services. Contact your provider or check your online account for this feature.
Most smartphones don't have built-in features to block entire area codes, but there are workarounds:
Protecting Your Number:
Remember that the best protection is prevention. Be cautious about where you share your phone number online, review privacy policies before signing up for services, and consider using a secondary number for online forms and less trusted services.
No. When you block a number, the caller typically hears a few rings and then is sent to voicemail. They won't receive any notification that they've been blocked. On some systems, they might hear a message saying the call cannot be completed as dialed, but this doesn't explicitly state they've been blocked.
This depends on your device and carrier. On iPhones, blocked callers can still leave voicemail, but the messages will appear in a separate "Blocked Messages" folder. On many Android phones and landlines, blocked calls are prevented from leaving messages entirely. Check your specific phone's settings or with your service provider for details.
This is a common challenge. Consider using more comprehensive approaches like "Silence Unknown Callers" on iPhone, spam filtering features on Android, or third-party apps that can detect and block spam calls regardless of the number they're coming from. For persistent harassment from multiple numbers, contact your phone provider for additional options.
No. Emergency services (999/112) cannot be blocked on any phone system. Even with the strictest call blocking settings enabled, emergency calls will always connect. This is a mandatory safety feature built into all phone systems.
Most modern smartphones allow you to block thousands of numbers, so you're unlikely to hit any practical limit. Some older landline phones with built-in blocking might have more modest limits (typically 50-100 numbers). Check your device's user manual for specific limitations.
Have you received unwanted calls from numbers not on your block list? Report them to our database to help others identify and block these numbers too.