What is peer-to-peer SMS? Isn't it a dime?

Simply put, point-to-point SMS means that one mobile phone sends SMS before another, and the SMS sent to the information desk is not a point-to-point SMS. Among them, there are point-to-point in the network (mobile to mobile) and point-to-point outside the network (mobile to Unicom or PHS)

Generally, point-to-point within the network is 1 point-to-point outside the network, depending on how you order there.

If there is no subnet, it should be 1 gross inside and outside the subnet.