Why can't overseas SMS harassment be intercepted?

1. Different international SMS communication protocols: SMS communication protocols in different countries and regions may be different, which makes it more difficult to intercept overseas SMS. For example, the short message communication protocol in China is SMPP, while the short message communication protocol in the United States is SMPP or SMTP.

2. Liars use fake numbers: Liars can use fake mobile phone numbers or send short messages using VoIP, which is difficult to track and intercept.

3. Liars use VPN and other tools: Liars can use VPN and other tools to hide their real IP address and location, which is difficult to be tracked and intercepted.

4. Legal and regulatory restrictions: Different countries and regions may have different definitions and punishment standards for SMS harassment, which makes it difficult to effectively combat and sanction SMS harassment abroad.