Why does Unicom charge for peer-to-peer SMS?

The reason for this situation is that the receiver's mobile phone has not opened the 5G message service, and the sender's mobile phone is in a state of no network.

1. The receiver's mobile phone is not enabled with the 5G message service: even if the receiver's device itself supports the 5G message technology, users need to purchase corresponding packages or enable specific services to enjoy related functions. Users have not handled relevant business, so they can't exchange information directly in this way, so they need to use ordinary SMS instead.

2. The sender's mobile phone is in a network-free state: the mobile phone that sends the short message is in a network-free state, so it cannot send the message directly through the Internet. Operators will provide base station forwarding service to transmit short messages, and will charge users the corresponding fees.