How to Block A Number to Protect Kids From Unknown Calls

By Last Updated: October 17th, 2023Categories: Parental Control

The one thing that parents always tell their kids is “Don’t talk to strangers.” And that seemed to work until mobile phones became a thing. It’s good that parents nowadays give their kids access to phones. They undeniably make communication through calls easier, especially during emergencies.

The Issue

However, letting kids have phones may also lead them to interact with strangers if left unchecked. Whether initiating the call or receiving calls, that’s a parent’s nightmare! If your kids happen to be talking with someone you barely know over the phone, you must not ignore that. Who knows if they are talking to a scammer or worse, a child predator.

Whatever is going on, you need to know how to block a number and implement a call restriction. That way, you can protect them from such threats. Read on for more details.

Part 1: How to Block A Number on Android

This is a general method on how to block a phone number on Android. The process may vary slightly depending on the phone brand and user interface of the device. The latest Android versions have built-in features now that can block a number. If your kids are using an older one, you may need to install a phone call block app from Google Play.

Steps to Block A Number from Android Phone App

  • Navigate through your kid’s phone, and launch the Phone App.
  • Tap on the three-dots option in the upper-right corner of the screen to get to the menu options.
Android Phone Dialer Option
  • Select the Call Settings and proceed to Call blocking & Decline with a message.
  • There, hit the “Blocked numbers” option, and then tap on the + sign to add the number you need to block.
  • Choose to add or paste a new number to block or select from existing contacts or call history.
  • After entering the number or choosing which contact number, hit “Block”.

That’s how easy it is to block a number on your kids’ Android phones.


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  • View SMS/IMs, call logs, contacts, emails, browser history

Part 2: How to Block A Phone Number on iPhone

Apple has made sure to include features that can help you block incoming calls to avoid spam calls and prevent unknown numbers from disturbing your peace. And you can block phone numbers not only on Voice Calls but also on FaceTime and Messages.

Steps to Block Incoming Calls and Phone Numbers on iOS Phone App

  • Open the Phone app and then, tap on any of the following: Favorites, Voicemail, and Recents.
  • Hit the icon with the letter “i” beside the phone number of the phonebook contact you need to block on your kids’ phones.
  • There, the details of the number or the contact are displayed. Scroll down to the bottom, and then tap on the “Block this Caller” or “Block Contact” option.
iPhone Block Contact

You can also do this on the Contacts app. Either way works just the same.

In addition, if you don’t want to block any number, you may also forward unknown and spam calls to voicemail automatically. That way they’d think that the one they’re calling is not available at the moment.

Steps to Forward Incoming Calls And Spammers to Voicemail

  • Get into the Settings and then, proceed to Phone.
  • There you will see the options: Silence Unknown Callers and Call Blocking & Identification.
  • Select the former if you only way to receive calls from saved contacts or from a recent outgoing call that you made.
  • Choose the latter to activate the Silenced Junk Callers to mute incoming calls from unknown numbers classified by your carriers as threats or spam. However, this may not be available for other carriers.

After that’s set up, rest assured that all the unknown calls will never bother your kids again.

Bonus: Monitor Your Kids Incoming Calls with mSpy

A good parent knows when to act and block a number. You can’t just indiscriminately block phone numbers on your kids’ phones, right? Because if you do that, you might cause confusion or conflict with your kids.

You should ask them first if they’ve been receiving unknown calls or calling strangers. If they don’t tell you the truth, that’s where you will need your parental control best friend mSpy.


mSpy Phone Tracker

Track Android phone & tablet, iPhone & iPad remotely and secretly! Everything is visible to you!

  • Read all social media apps, FB, IG, WhatsApp, Snapchat
  • View SMS/IMs, call logs, contacts, emails, browser history

mSpy is one of the most effective phone monitoring programs today. It can help you level up your parental control measures and monitor your children’s incoming phone calls in real-time. And the things you’d definitely like about mSpy is that it works remotely and silently, and it runs on both iOS and Android devices. So, whatever phone your kids have, you can truly rely on this tool!

Monitor Calls

To check your kids’ call history, you will have to take advantage of mSpy’s Calls feature. It will give you a complete list of all the outgoing, incoming, and missed calls on your kids’ phones. In addition, it will provide the other important details of the calls such as phone numbers, date & time, and the duration. This will give you more idea on how frequently a phone number calls.

mSpy Track Calls

Check Contacts

Besides keeping up with all the calls, you may also need to check on specific contacts on your kids’ phones. That way, you will know the full details such as the complete phone number or if there’s any available email address you can take note of. This will make it easier for you to identify who needs to get blocked.

mSpy Track Contacts

There are other features that can help you improve monitoring. You may read social media chats or text messages to expand your monitoring. You can even make use of the Restricted features to block pornography or restrict apps and websites on our kids’ phones. Definitely, mSpy is an all-purpose monitoring app for parents who need a hand.

Get Started and Monitor Incoming Calls with mSpy

  • For starters, use a valid email to create a new mSpy account. Click on the button below to sign up immediately.
  • Purchase the subscription package of your choice and wait for your email confirmation.
  • Read the email and follow the installation guide to download and set up mSpy on your kid’s phone.
  • When installed, log in to your mSpy account and proceed to the Dashboard. There, look for the General Features tab and find Calls and Contacts.
  • Click either of the two and see the numbers and contacts calling your kids without you knowing.

If you want to know more about mSpy and explore its other features, install it now!

Alternative 1: Listen to Unknown Number Phone Calls

If you want to make sure that everything is alright, you may also consider tapping into their phone calls from unknown numbers. That way, you can carefully assess whether or not the caller is a serious threat. How? Well, you just have to use FlexiSPY, a phone monitoring program that specializes in recording phone calls and listening to live calls remotely.

Yes! With FlexiSPY, you can just sit tight and relax as you take advantage of the Intercept Calls feature. You can listen to everything that your child and the caller is talking about. That way, you will be able to evaluate if the caller is a child predator or someone who’s trying to scam people. You also get a list of all the contacts and calls.

One thing that makes FlexiSPY stand out is its Alerts feature. It will allow you to get personalized alerts on specific Caller IDs. This allows you to know if the phone numebr you’ve been suspicious about is calling your kids.

And from the name itself, FlexiSPY is a flexible spy app. It can run on Android, iOS, Windows, Mac, etc. Isn’t that cool? If you’re interested, try the demo now!

Alternative 2: Track Suspicious Numbers and Calls

In case things go out of hand, and the unknown caller has caused damage to your kids’ well-being, you need to track who’s behind it. And the easiest way is via Scannero, a powerful phone tracker that only requires the target’s phone number.

Scannero Tracker

With Scannero, you just type the number of targets on the search bar and then click on locate. The phone tracker will then allow you to make a message with a phishing link that will track the precise geolocation of the number on the map. You just have to make sure that the content of your text is convincing. You can tell them to click to win prizes or whatnot.

Localize Process

Moreover, you won’t have to worry about the location of your target. Scannero can track from any country however far away they are. Phone brands and carriers don’t matter as well. How cool is that?

So, if you need a tool that can help you pinpoint suspects to the authorities, you can trust Scannero.

Final Thoughts

Protecting your kids from spammers, predators, and other threats from unknown callers is a must. That’s why when your kids are constantly receiving calls or talking to strangers on the phone, you must not take your guard down.

You have to do whatever it takes to protect them and prevent damages. If it comes to it, make use of the methods above to block a number and monitor your kids’ calls regularly.

Frequently Asked Questions

If you want to block a phone number remotely, you may need to install or use remote phone call blocker apps. You may find some reliable ones on Google Play or App Store. You may also try searching for online markets for other third-party blockers.

Aside from turning your phone off, you may proceed with activating the Airplane Mode. That way, your phone is completely isolated from any network reception, and no calls or messages will be able to disturb you.