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Cyber ​​Fraud: The problem arises when people fail to update their contact details with banks, email providers, social media platforms, or other online services after changing their mobile number.

Cyber ​​Fraud: Nowadays, mobile numbers are not limited to just calls and messages. The same number is linked to your bank accounts, UPI apps, social media profiles, email, and various online services. But did you know that a mobile number you have stopped using can be re-allocated to another person after just a few months? This can put your personal information and online accounts at risk.

Your old number could be assigned to someone else.

When a customer deactivates their mobile number or stops using it for an extended period, telecom companies re-issue that number to a new customer after a certain timeframe. Typically, this process can be completed within 45 to 90 days.

The issue arises when people fail to update their contact details with banks, email providers, social media platforms, or other online services after changing their number. Consequently, the new holder of the number could—either inadvertently or intentionally—gain access to information linked to your accounts.

OTPs and 2FA codes could reach a stranger

Most online services employ Two-Factor Authentication (2FA) for security. This involves sending an OTP to your mobile number during logins or password changes.

If your old number has been assigned to someone else but remains linked to your accounts, password reset links, OTPs, and other critical security alerts could reach that person. This could potentially open the door for unauthorized access to your email, social media, or banking services.

This problem is growing rapidly

Every year, millions of mobile numbers become inactive and are subsequently re-issued. This issue is becoming increasingly serious due to our growing reliance on digital services.

Cybercriminals often exploit such numbers to carry out fraud, such as account takeovers. The risk increases significantly if an account’s recovery process relies on an old mobile number.

Take these essential steps immediately

Check all important accounts

Log in to your email, banking apps, UPI services, social media platforms, and other critical accounts to verify which mobile number is linked to them.

Update to the new number

Update your current mobile number wherever the old one is listed.

Remove the old number

Simply adding the new number is not enough; it is crucial to completely remove the old number to eliminate future risks.

Move beyond SMS-based 2FA

Instead of relying solely on OTPs, use authenticator apps. These apps generate security codes directly on your device and do not depend on your mobile number.

Check recovery settings

Ensure that your old number is not listed as a backup contact or recovery option for any of your accounts.

Why is this precaution necessary?

Since the supply of mobile numbers is limited, telecom companies reissue old numbers—a practice that will continue in the future. Consequently, you must take personal responsibility for your digital security.

If you have recently changed your number or stopped using an old one, check all your important accounts today. Even a moment of negligence could put your bank account, email, and social media profiles at risk.