How does Apple's mobile phone intercept foreign calls and text messages?

You can just blacken the number of the text message.

If you often receive some short messages from abroad when using the iPhone, you can just hack them if you don't want to receive them. First, when you receive these short messages, you extract the number sent by him, then dial it once with the dial key of your mobile phone and hang up immediately, so that you can add this number to the blacklist.