In recent times, companies have been leveraging identity card information to facilitate WeChat mobile phone number registration. However, individuals may be concerned about the security implications of using their personal identity information for this purpose. In this article, we will explore alternative methods to prevent one's identity information from being used to register a new mobile phone number. It is essential to be aware of these novel techniques to safeguard personal data and maintain digital security. By utilizing encryption tools, biometric authentication, and other innovative solutions, individuals can enjoy secure and private transactions while transacting with companies.