SIM swap attacks have become a growing security threat, with carriers' inadequate responses leaving businesses and consumers vulnerable to hackers. These attacks exploit SIM cards by deceiving carriers into transferring mobile numbers from one device to another, allowing identity thieves to intercept security checks such as one-time password messages. Businesses can mitigate these risks by combining SIM swap detection software with security best practices, including multi-factor authentication and awareness of common scams. Critical defenses include using tools like Twilio's Lookup SIM Swap, which provides companies with the means to detect SIM swaps before sending out OTP authentication messages, and implementing two-factor authentication on all accounts. By understanding how SIM swapping fraud works and taking proactive measures, businesses can protect themselves against these attacks and prevent significant revenue losses.