What's wrong with the SMS package?

Yes, it's still inside and outside the network.

If you are a mobile phone card, it is Unicom Telecom outside the network.

The others are similar. .

For the intranet, the cost generated by the operator's own internal system is extremely low, so he can send more calls or text messages in the intranet. If it is off-network, it involves inter-network settlement between operators, and it is generally less sent out-of-network.