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- October 18, 202614°
- BIST10011,722-2.89%
- USD49.45+0.05%
- EUR55.62+0.37%
- GOLD4,181.10+0.26%
- INTEREST37.00%-1.00
- BITCOIN82,006+0.77%
- October 18, 202614°
Changing Your Phone Number Alone May Not Solve Cyber Attacks
Users whose phone numbers have been compromised should secure their email, bank accounts, and recovery settings before changing the number. An expert highlights that a new number can be useful in some cases but will not solve the problem on its own.
Getting a new phone number is not always the first step for users whose number has been compromised. An expert says that if attackers maintain access via email, bank logins, recovery settings, or the operator account, changing the number alone will not be sufficient.
The text describes a user's account being compromised again and experiencing access issues to accounts linked to their old number. In response, it is recommended to first strengthen security on the mobile line, then protect email, banking, and credit card accounts.
First, Lock Down the Line and Accounts
The expert advises establishing direct and official communication with the mobile operator, checking for activities such as SIM swaps, number porting attempts, new device additions, call forwarding, and unauthorized users. Additionally, adding a strong account PIN, number porting lock, and SIM lock if available is recommended.
It is also stated that the email account must be secured. For this, changing the password, logging out of all sessions, reviewing recovery emails and phones, removing unknown forwarding rules, and strengthening two-factor authentication are suggested.
Stronger Methods Instead of Text Codes
The text explains that reliance on SMS verification codes for important accounts can become risky. Therefore, it is emphasized that methods like authenticator apps, security keys, or passkeys should be preferred.
Recommendations also include not changing passwords from suspicious devices, checking devices for malware, and using unique passwords for every important account.
Additional Steps Against Fraud and Identity Theft
The text conveys that if unauthorized card transactions are seen at banks, direct contact should be made with the relevant institutions' fraud departments. Canceling suspicious cards, obtaining new card numbers, enabling transaction alerts, and removing unrecognized devices from online banking are recommended.
If there is a risk of identity theft, placing a credit freeze and filing an identity theft report are also among the suggestions. This can make it harder for attackers to open new credit accounts.
When to Consider Changing the Number
The author states that if attack attempts via the same number persist despite all security measures, a new number can be considered. However, this should only be done after critical accounts are updated and the old number is removed from recovery options.
The main conclusion of the text is that instead of changing the phone number, the attack chain—comprising email, bank, line, and recovery settings—must first be shut down.
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