Miui: Does the other party know about free SMS?

I see. Miui Free SMS The other party knows that this communication method is a way of long-distance communication between the two parties, and it can be operated on the same frequency, because the other party knows the specific information it publishes. Short message is text or digital information sent or received directly by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.