Easy Steps to Remotely Block Your Stolen MTN SIM Card

Many people face challenges when it comes to blocking stolen SIM cards, which can be stressful considering the sensitive information they carry, such as banking details. However, MTN has introduced a convenient solution that allows you to remotely block your line without the need to visit an MTN office. Here's a simple guide on how to do it.


How to Remote Block Your MTN SIM Card:

MTN has streamlined the process to make it accessible to everyone, even for those with limited technical knowledge.

Dialing Options:

·        Dial *123*7*4# from any MTN phone.

Alternatively, dial *123# (MTN's self-service USSD dial).

Follow the prompts by inputting '7' for Self-Service, and then '4' for Block Stolen or Lost SIM.

Choose Your Method:

You will be presented with two options to block your SIM card:

a. MTN Secure PIN:

Enter your MTN Secure PIN (the same PIN used for MTN Share).

b. Security Questions:

Answer three security questions to validate ownership of the line.

If the answers are correct, the line will be blocked.

Incorrect answers will prompt a visit to the nearest MTN Store for assistance.

Successfully Blocked SIM:

Once your SIM is successfully locked, no activities can be carried out on it. If you need to reactivate or get a SIM swap, you can visit the MTN office.


This service is free of charge.

It is accessible through the Self-service platform via USSD, making it convenient for users to block their SIM cards from the comfort of their homes.

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