The difference between non-monthly rental registration card and mobile phone card

The difference is that the registration card is rented in October, and the card can be used without SM, but its service life is short. You can only send and receive short messages starting with 1069, which are mainly used to register things. You can't make personal calls, send text messages, surf the internet, etc. And the number segment is different. If you still don't understand, you can trust me privately.