Unwanted calls from unknown numbers can be a significant nuisance, disrupting your daily routine and potentially exposing you to scams. Fortunately, there are several effective methods to screen these calls on your mobile phone. This guide explores both built-in features and third-party applications to help you manage unknown callers effectively.
What Are Unknown Callers?
An "unknown caller" refers to a phone call from a number that does not display its caller ID information. This category often includes telemarketers, robocallers, and scammers who hide their identity to avoid detection. (howtogeek.com)
How Can I Block Unknown Callers on My iPhone?
iPhone users have a built-in feature called "Silence Unknown Callers" that can help manage these calls:
- Open Settings: Navigate to the Settings app on your iPhone.
- Access Phone Settings: Scroll down and tap on "Phone."
- Enable Silence Unknown Callers: Toggle on the "Silence Unknown Callers" option.
With this feature enabled, calls from numbers not in your contacts will be silenced and sent directly to voicemail. The calls will still appear in your recent calls list, allowing you to review them later. (idownloadblog.com)
How Can I Block Unknown Callers on My Android Phone?
Android devices offer various methods to block unknown callers, depending on the manufacturer and model:
For Google Pixel Devices:
- Open the Phone App: Launch the Phone app on your Pixel device.
- Access Settings: Tap the three-dot menu in the top-right corner and select "Settings."
- Enable Filter Spam Calls: Under "Caller ID & spam," toggle on "Filter spam calls."
- Block Unknown Callers: Go back to "Settings," tap "Blocked numbers," and toggle on "Unknown."
For Samsung Galaxy Devices:
- Open the Phone App: Launch the Phone app on your Samsung device.
- Access Settings: Tap the three-dot menu in the top-right corner and select "Settings."
- Enable Caller ID and Spam Protection: Toggle on "Caller ID and spam protection."
- Block Unknown Numbers: In the "Blocked numbers" section, toggle on "Block calls from unknown numbers."
These settings will help reduce unwanted calls by blocking or filtering calls from unknown numbers. (howtogeek.com)
What Are Third-Party Apps for Blocking Unknown Callers?
For enhanced call screening, third-party applications can provide additional features:
RoboKiller:
RoboKiller is a popular app designed to block spam and robocalls. It uses a database of known spam numbers to identify and block unwanted calls. Users can also create custom block lists and report spam numbers. (kiplinger.com)
Hiya:
Hiya offers a free app that identifies and blocks spam calls. It provides real-time alerts and a community-based spam list to help users avoid unwanted calls. (kiplinger.com)
Truecaller:
Truecaller is another app that identifies unknown calls and blocks spam. It has a large user community that contributes to its spam database, improving its accuracy over time. (kiplinger.com)
How Do Carrier Services Help in Blocking Unknown Callers?
Many mobile carriers offer services to help block unwanted calls:
- AT&T ActiveArmor: Provides spam call blocking and fraud call blocking features. (kiplinger.com)
- T-Mobile Scam Shield: Offers scam call blocking and caller ID verification. (kiplinger.com)
- Verizon Call Filter: Identifies and blocks spam calls and provides a spam risk meter. (kiplinger.com)
These services can be activated through your carrier's app or customer service.
Are There Any Drawbacks to Blocking Unknown Callers?
While blocking unknown callers can reduce unwanted interruptions, it may also block important calls from numbers not saved in your contacts, such as calls from doctors, delivery services, or businesses. It's essential to weigh the benefits against the potential inconvenience of missing important calls. (idownloadblog.com)
How Can I Unblock a Number on My iPhone?
If you decide to unblock a number on your iPhone:
- Open Settings: Navigate to the Settings app.
- Access Phone Settings: Tap on "Phone."
- Manage Blocked Contacts: Tap on "Blocked Contacts."
- Unblock the Number: Find the contact you wish to unblock and tap "Edit" in the top-right corner, then tap the red minus button next to the contact's name and confirm by tapping "Unblock."
How Can I Unblock a Number on My Android Phone?
To unblock a number on Android:
- Open the Phone App: Launch the Phone app on your device.
- Access Settings: Tap the three-dot menu and select "Settings."
- Manage Blocked Numbers: Tap on "Blocked numbers."
- Unblock the Number: Find the number you wish to unblock and tap the "X" or "Unblock" option next to it.
Conclusion
Screening unknown callers is essential in today's world to avoid unwanted interruptions and potential scams. By utilizing your phone's built-in features, third-party apps like RoboKiller, and carrier services, you can effectively manage and block unwanted calls. Always consider the potential impact on important calls and adjust your settings accordingly.
Highlights:
- I haven't answered a scam call in months - this hidden iPhone feature is why, Published on Wednesday, March 18
- Call Screening in iOS 26 has finally ended my spam call nightmare - here's how to set it up, Published on Thursday, September 25



