What is a point-to-point short message within and between networks?

Out-of-network refers to mobile-to-mobile in-network, mobile-to-Unicom out-of-network, Unicom in-network and Unicom out-of-network. ● In-network means that the operator is China Mobile, and point-to-point means mobile phone to mobile phone. Peer-to-peer SMS refers to sending SMS to mobile users in China ● SMS with mobile phone number and SMS with Unicom phone number belong to peer-to-peer SMS. The short message from mobile phone number to Unicom number belongs to peer-to-peer short message between networks.