To avoid SIM card hijacking attacks, take these steps: First, contact your mobile carrier to add extra security, like a PIN or password, to your account. Avoid sharing sensitive personal details online, as attackers often use this info for social engineering. Enable two-factor authentication (2FA) on all accounts, but use an authenticator app instead of SMS where possible—SIM hijackers can intercept texts. Regularly monitor your phone for unusual activity, such as sudden signal loss or unexpected texts. Don’t link your phone number to critical accounts like banking or email; use a separate, private number if feasible. If you suspect an attack, immediately notify your carrier and secure your accounts. Staying proactive and minimizing your digital footprint are key to thwarting these scams.