The principle and function of SMS blocker are as follows:
原理（Principle）：
短信拦截器的工作原理主要是通过识别、分析和过滤短信内容，以阻止不合法、不良或骚扰短信的接收，它通常依赖于预设的规则和算法，对接收到的每一条短信进行实时扫描和判断，如果短信内容符合预设的拦截规则（如包含特定关键词、来自特定号码或特定时间段等），则会被自动拦截并存储到拦截列表中。
作用（Function）：
短信拦截器的主要作用是保护用户免受骚扰和欺诈，它可以有效过滤掉广告推销、诈骗信息、恶意链接以及其他类型的垃圾短信，从而保护用户的隐私和安全，短信拦截器还可以帮助用户管理通信，避免重要信息被不重要或无关的短信所淹没，通过拦截器，用户可以自定义拦截规则，只接收重要或感兴趣的信息，提高生活和工作的效率。
英文表达为：
The principle of SMS blocker is to identify, analyze and filter SMS content to prevent the reception of illegal, bad or harassing messages. It generally relies on preset rules and algorithms to scan and judge each received SMS in real time. If the content of the SMS matches the preset blocking rules (such as containing specific keywords, coming from specific numbers or specific time periods), it will be automatically blocked and stored in the block list.
The function of SMS blocker is to protect users from harassment and fraud. It can effectively filter out advertising sales, fraud information, malicious links, and other types of spam SMS, thus protecting user privacy and security. In addition, SMS blockers can also help users manage their communications and avoid important information being overwhelmed by unrelated or unimportant SMS. Through the blocker, users can customize blocking rules to only receive important or interesting information, improving efficiency in life and work.
