How To Block A Number On MTN South Africa (2025)

Posted on Author Peter Mokoena

Blocking a number on MTN South Africa is primarily done through your mobile device settings, as MTN itself does not offer a direct network-level blocking service for individual numbers.

It is a good idea to bookmark this article in case you need the information again – because unwanted calls and messages can quickly become a source of stress and disruption. Whether it’s persistent telemarketers, spam messages, or someone you simply no longer wish to communicate with, blocking a number is a powerful way to reclaim your privacy and peace of mind.

Here is all you need to know:

Why Block a Number?

Blocking a number can serve multiple purposes:

  • Prevent harassment or stalking
  • Avoid spam or robocalls
  • Stop unwanted marketing messages
  • Create boundaries with personal contacts
  • Protect children or vulnerable users from inappropriate communication

Whether you’re dealing with a one-time nuisance or a recurring issue, knowing how to block a number empowers you to take control of your mobile experience.

Does MTN Offer Network-Level Blocking?

MTN South Africa does not currently offer a direct network-level service for blocking individual numbers. This means you cannot call MTN and ask them to block a specific number from reaching you. Instead, blocking is handled through:

  • Your phone’s built-in settings
  • Third-party apps
  • Call management features like voicemail or call forwarding

However, MTN does offer tools for managing spam and promotional messages, which we’ll cover later in this guide.

How to Block a Number on Android Devices

Android phones offer robust call-blocking features that vary slightly depending on the manufacturer (Samsung, Huawei, Xiaomi, etc.), but the general process is similar across devices.

Method 1: Block via Phone App

  1. Open the Phone app.
  2. Go to the Recents tab.
  3. Tap the number you want to block.
  4. Select the “i” icon or Details.
  5. Tap Block number or Block contact.
  6. Confirm your choice.

Once blocked, the number will no longer be able to call or text you.

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Method 2: Block via Settings

  1. Open the Phone app.
  2. Tap the three dots in the top-right corner.
  3. Select Settings > Blocked numbers.
  4. Tap Add a number.
  5. Enter the number manually and confirm.

This method is useful if you want to block a number that hasn’t called you yet.

Method 3: Block Unknown or Private Numbers

  1. Go to Phone > Settings > Block numbers.
  2. Toggle Block unknown callers or Block private numbers.

This feature automatically rejects calls from hidden or unlisted numbers.

How to Block a Number on iPhone Devices

Apple’s iOS makes it easy to block unwanted contacts and numbers.

Method 1: Block via Recents

  1. Open the Phone app.
  2. Go to the Recents tab.
  3. Tap the “i” icon next to the number.
  4. Scroll down and select “Block this Caller”.
  5. Confirm your choice.

Method 2: Block via Contacts

  1. Open the Contacts app.
  2. Select the contact you want to block.
  3. Scroll down and tap “Block this Caller”.

Method 3: Silence Unknown Callers

  1. Go to Settings > Phone > Silence Unknown Callers.
  2. Toggle the feature ON.

This sends calls from unknown numbers directly to voicemail without ringing your phone.

Blocking Numbers via Third-Party Apps

If your device’s built-in blocking tools aren’t enough, third-party apps offer advanced features like spam detection, caller ID, and community-based blocking.

1. Truecaller

Truecaller is one of the most popular call management apps globally.

  • Features:
    • Identifies unknown callers
    • Blocks spam and robocalls
    • Allows manual number blocking
  • How to Use:
    • Download from Google Play or App Store
    • Register with your MTN number
    • Tap on a number and select Block

Truecaller maintains a global spam list, so many unwanted calls are blocked automatically.

2. Hiya

Hiya offers similar features to Truecaller but focuses more on spam protection.

  • Features:
    • Real-time spam alerts
    • Call blocking
    • Reverse phone lookup
  • How to Use:
    • Download and install
    • Enable permissions
    • Block numbers manually or automatically
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3. Call Control

Call Control is ideal for users who want to customize their blocking rules.

  • Features:
    • Block by area code or prefix
    • Create personal block lists
    • Schedule call blocking

Blocking SMS and Promotional Messages

While MTN doesn’t allow you to block individual numbers at the network level, you can opt out of promotional messages and spam.

Opt Out of MTN Marketing SMS

  • Send STOP to 30630 to unsubscribe from MTN promotional messages.
  • You can also dial *135*3# and follow the prompts to manage marketing preferences.

Block SMS on Android

  1. Open the Messages app.
  2. Tap the conversation from the number you want to block.
  3. Tap the three dots > Details > Block & report spam.

Block SMS on iPhone

  1. Open the Messages app.
  2. Tap the conversation.
  3. Tap the “i” icon > Info > Block this Caller.

How to Handle Harassment or Threats

If you’re receiving threatening or harassing messages or calls, blocking the number is only the first step. You should also:

  • Report the incident to MTN: Contact customer care and provide details.
  • File a report with SAPS: If the harassment is serious, involve law enforcement.
  • Keep records: Save screenshots, call logs, and messages as evidence.

MTN may assist with tracing or investigating serious cases in collaboration with authorities.

Tips for Managing Blocked Numbers

Blocking a number doesn’t always mean it disappears completely. Here are some tips to manage blocked contacts effectively:

1. Review Your Block List

Periodically check your block list to ensure it’s up to date. You may want to unblock someone or add new numbers.

2. Use Do Not Disturb Mode

If you want to silence all calls except from specific contacts:

  • On Android: Settings > Sound > Do Not Disturb
  • On iPhone: Settings > Focus > Do Not Disturb

You can whitelist important contacts while blocking everyone else.

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3. Set Up Voicemail Filters

Some voicemail apps allow you to filter messages from blocked or unknown numbers. This adds an extra layer of control.

MTN Customer Support

If you need help managing unwanted calls or messages, MTN offers several support channels:

  • MTN App: Use the in-app chat feature.
  • USSD: Dial *135# for account management.
  • Call Center: Dial 135 from your MTN number.
  • WhatsApp Support: MTN offers customer care via WhatsApp for quick assistance.

While MTN cannot block individual numbers for you, they can guide you through available tools and escalate serious cases.

Frequently Asked Questions

Can MTN block a number for me?

No, MTN does not offer direct number blocking. You must use your phone’s settings or third-party apps.

Will blocked numbers know they’ve been blocked?

No. Blocked callers will hear a busy tone or be redirected to voicemail, depending on your settings.

Can blocked numbers still leave voicemails?

Yes, unless you use a voicemail app that filters blocked contacts.

Can I block numbers that haven’t called me yet?

Yes. You can manually enter a number into your block list on both Android and iPhone.

What happens if I change phones?

Your block list may not transfer unless you use a cloud backup or third-party app like Truecaller.

Final Thoughts

Blocking a number on MTN South Africa is a simple yet powerful way to protect your privacy, reduce stress, and manage your mobile experience. While MTN doesn’t offer network-level blocking, your device and third-party apps provide all the tools you need to take control.

Whether you’re dealing with spam, harassment, or simply want to avoid certain contacts, this guide equips you with the knowledge to act confidently. From Android and iPhone settings to app-based solutions and privacy tips, you now have a complete toolkit to block unwanted communication and enjoy a more peaceful digital life.