So, SIM swapping is a deadly cyberattack in which you lose your telecommunication control and account access to the cybercriminals. They have all the access and authority to your key communication activity. This write-up gives a detailed description of SIM swapping and provides you effective tips to stay safe from it. So let’s get started!
How SIM Swapping Works?
Cybercriminals use a mix of different methods to do the SIM swapping. It includes social engineering attacks, malware infiltrations, and data collection from online platforms. These attacks happen at different levels that allow black hats to gather as much information regarding the target as possible. So here is the step-by-step process of how SIM swapping works:
Spying Stage
It is the first stage where scammers spy on you just like a thief watching a house before breaking in a house. In this stage scammers collect personal information about you that includes name, email, phone number, work address and daily routines. To do so they follow you on social media and learn about your friends, hobbies, places you visit etc. These small clues help scammers impersonate you and create a duplicate digital profile bit by bit using the small breadcrumbs they gather from here and there.
Phishing Attacks
Attackers use phishing attacks that involve fake email and SMS alerts to trick the users to reveal important details and personal Identification numbers.
Target Your Carrier
Once scammers have your personal information they target your mobile carrier. They use social engineering to persuade the representative to transfer your number to a SIM card they can control. In this process they use your personal details to act like you. To convince the representative they make up stories such as I lost my phone so I need to activate a new SIM card as soon as possible to attend some important business calls. Scammers sound so confident and fluent in their requests the telecom provider often becomes convinced that they easily issue a new SIM as per the requests.
Sometimes scammers just walk in the store with your personal details and use them to transfer your number to a new SIM card. In some rare cases scammers bribe the telecom agents to complete the SIM transfer. If the agent is careless and accepts the amount scammers get what they want. The carrier activates the attacker`s SIM with your number and your phone loses all the telecom service at once.
Account Takeover
Once scammers get the number transferred to a new SIM the attacker starts controlling and taking over all your key accounts such as email, banking, social media, crypto wallet and cloud access points. After account takeover, they change all the passwords, recover emails and enable account locks so the victim cannot get back the lost account easily. Once this is complete you lose access to all your calls, messages, emails and any online activity. Attackers have complete control over all your accounts and activities.
What do Scammers do After a SIM Swap?
When scammers successfully move your number to their SIM they can execute a lot of activities that put your online privacy and security at high risk. They can:
Steal OTPs and 2FA codes
They get the one-time passwords sent by SMS and use them to log into your bank, email, or social apps
Take over email and social accounts
With access to SMS OTPs they reset passwords and lock you out.
Drain bank accounts / do payments
They approve transfers, UPI payments, or card changes using SMS codes.
Use your identity
They can request loans, credit cards, or new accounts in your name.
Commit fraud on contacts
They message your friends/family asking for money or links (“I’m in trouble – send cash”).
Sell the number / SIM benefits
They might sell the number or use it to receive verification codes for other scams.
Hide tracks
They may clear call/SMS logs, change recovery details, or use VPNs to hide their location.
What are the Signs that Signal SIM Swap?
When SIM swap happens you do not get any idea about it. During this process the phone gives some hints but they remain unnoticed. As a result, it gets quite late until you know what is going on. Here are some sure signs that tells you about SIM swapping:
1. Suddenly No Network or Signal
If your number is transferred to a new SIM your device notifies you of ‘No Service’ or ‘Emergency Calls Only’ but when you check it with others around you their network service works normally. If you ever experience this situation then it is a strong sign that some have got your SIM swapped.
2. Strange Messages or Alerts
Sometimes you get an alert notification or email from the telecom service that your New SIM Request is approved and the new SIM will be activated within a certain time duration. If you ever get this type of alert or email on your mobile, never ignore it. They are strong signs that someone is trying to issue a duplicate SIM with your current number.
3. Bank Notifications Stop Coming
In SIM swapping you do not get OTPs, banking alerts, and transaction messages. It is a strong sign that your alerts and OTPs are being transferred to a new number. Someone has hijacked your SIM and received all the alerts and messages.
4. Locked Out of Your Accounts
Attackers change critical account passwords when they successfully swap your SIM. So, if you are not able to log in to apps and your passwords do not work then know that someone has got your phone number transferred to their SIM.
5. Unusual Account Activity
Scammers open and login your key accounts such as email, social media and banking into new devices. You may get alerts on your email and message apps about these unknown activities. These are red flags that someone has swapped your SIM and used it to login your apps and accounts using that device.
What to do If Your SIM is Swapped?
If you see that your number is transferred to a new SIM and you no longer have any control over it then here are some quick steps you need to take to prevent the damage:
If you see that your number is transferred to a new SIM and you no longer have any control over it then here are some quick steps you need to take to prevent the damage:
- Contact your carrier on a different line and tell them it’s a SIM swap fraud. When you report the issue you must demand number reactivation and a fraud ticket.
- Immediately call your bank support representative and tell them about the theft of your number. Ask them to lock or freeze your bank account to prevent the theft of funds.
- Reset your important passwords such as email, social media, internet banking and other key accounts using a device that still has access.
- Contact the cybercrime control authorities in your locality and file a complaint regarding the scam you went through.
How to Prevent SIM Swapping Scams?
Securing your SIM is one of the most important things to prevent swapping scams and protect your digital assets. It is better to nip the evil in the bud before it takes full form. Here are some effective steps that can protect your SIM from swapping scams:
Do not Overshare Your Personal Data
Scammers pick up on your personal data from your online post of it that you share here and there. They collect these breadcrumbs and thrive on them. So, it is highly recommended that you avoid sharing too much about yourself on social media sites. In general, do not feed the internet too much about yourself.
Do not Use SMS-Based 2FA
SMS verification codes are convenient but they can be risky as well. If someone gets a duplicate SIM in your number he can receive all the OTPs and verification codes. So it would be safe to avoid using SMS based two-factor authentication services. Instead of this you should use app-based second verification methods to protect your privacy and security.
Do not Ignore Suspicious Signs
If you see signs like No Service or Sim not recognized or no networks then don’t ignore it. These are red flags some have got your number. If you come across any such situation then act fast and take the following actions:
- Call your carrier immediately from another phone.
- Check your email for password reset links you didn’t request.
- Lock your bank and email accounts right away.
Empower Your Email Security
Email is the key online channel that is used to access, authentication, get news and alerts regarding your banking, social media, verification and other online information. You must protect it at every cost. Here are some effective steps that help you enhance email security:
- Long, strong, and unique passwords.
- Two-factor authentication services.
- Add safe recovery options that only you control.
Verify Information from Carrier
If you ever get any alert, call or message from your carrier then it is highly important that you verify it before you submit to their requests. Never share any personal information with anyone on the phone that can directly affect you. To confirm the case you can go to the official support channels and make a contact from there to get clarifications.
