How to Prevent Sim Card Cloning (Guide)


Have you ever wondered what is sim card cloning and how to prevent your sim card from getting cloned? In this article you will understand what sim card cloning mean and how to prevent it from happening to you. Read carefully and adhere to all the instructions.

Hackers are exploiting every vulnerability on the internet. Hacking is now common and often affect a lot of people on social media.  It is easy for hackers to hack any facebook account that is vulnerable. We have also written on tips to help you secure your facebook account from hackers as well as recover a hacked facebook account.

A new but old method of hacking now is Sim Card Cloning. Once your Sim Card is cloned, the hacker can use it for fraudulent activities. Some use it to monitor your text messages, phone calls, social media chats, or even use the cloned sim card to take over your social media accounts. So today I am going to show you how you can prevent your phone number from getting cloned.

What Is Sim Card Cloning?

Sim card cloning is a process of duplicating a sim card. This service was introduced to help people that lose their important or special sim card.

Normally, when you lose your sim card, you can easily duplicate it, it is popularly known as “Welcome Back”. When the cloning is successfully done, the cloned SIM card’s identifying details will be automatically transferred to the secondary SIM card. The secondary card can then be used in a different phone while having all calls and associated charges attributed to the original SIM card. The phrase SIM clone is often used to refer to the SIM card that has been successfully duplicated.

Recommended: How to Secure WhatsaApp Account From Hackers

Sim Card cloning is a great service but a lot of hackers are misusing it, they clone sim cards without the consent of the Sim Card owners and start invading their privacy.

This is how you can find out if your sim card is cloned:

How To Know If Your Sim Card Is Cloned

When your sim card is cloned, you will start having some unusual activities on your sim card, for example:

  • Airtime usage, the hacker that cloned your sim card could be using your airtime. So always monitor your airtime.
  • Unnecessary text messages- Do you receive unnecessary text messages on your sim card? It could possibly be that someone cloned your sim card and he/she is texting people with it.
  • You will have many unknown and unsaved numbers when your sim card is cloned.
  • You will likely experience a lot of connection time out.
  • Unusual calls.
  • Increase in unknown calls and text messages.

All the things listed above are some of the primary things that you will experience when someone clone your sim card

Cloning a sim card is not hard at all as you think, that is why you need to keep your sim card very safe from hackers. Cloning a sim card will not take more than ten minutes if the hacker has all the things required to clone the sim card. However, this article is going to show you how to prevent your sim card from getting cloned.

How To Prevent Your Sim Card Cloning

Actually there are a few things that are required from you to prevent sim card cloning. They are very simple and they are all listed below, please make sure you adhere to all the instructions.

Do No Share Your PIN Code With Anyone

Your PIN code is very confidential, never share it with anyone for any reason. A hacker can easily clone your sim card when he or she knows your PIN code. So you have to be very careful of whom you share your PIN code with.

Do Not Keep Your Sim Card Away From You

Please avoid removing your sim card from your phone all the time, however, if you don’t have any phone to slot it the make sure you hide it where no one can see it.

Do Not Slot Your Sim Card On Someone’s Phone

Avoid slotting your sim card one anybody’s phone, especially someone you do not know or trust unless you want to do something very important urgently. But do not slot your sim card and leave it, it is very possible and very easy for the person to clone your sim card when you leave the sim card on their phone.

Recommended article: How to Stay Safe on the Internet

Remove Your SIM Card Before Taking Your Phone For Repairs

Many SIM card cloning cases have been traced to Mobile Phone Repairers. Most people leave their SIM cards in their phones during repairs. This is a very big mistake and must be avoided.

Many Phone Repairers clone their clients SIM cards and use them for fraud. At the end the real owner of the SIM card will be put in trouble.

To avoid this from happening, always remove your SIM card before taking your phone for repairs.

Beware Of Any Suspicious Activity

Another means of preventing your sim card from getting cloned is to be very careful and monitor any suspicious activities on your sim card. Once you notice any unusual activities on your sim card, your can call your network customer care to look into the matter as a matter of urgency, because it could be that someone is trying to clone your sim card.


Now you know what is sim card cloning and how to prevent your sim card from getting cloned. Make every effort to protect your SIM cards because a cloned SIM card that is used for fraud can put the real owner in trouble.

If you find this article helpful, please share it with your family and friends to increase the awareness against SIM card cloning.

Image Credits: Google Image search

Saint Yome

Saint Yome

Cyber Security Researcher and Consultant. Founder and CEO of Futtress Lab Ltd