Why can I send and receive text messages without networking? And prestige pp these can't?

hello

I'm happy to answer your question.

Because I graduated from communications.

Spent years running around.

I can still give you a brief talk!

Let me put it this way.

The signal from the mobile tower.

There are many channels.

Some channels are SMS transmission.

Some are responsible for surfing the internet.

As long as the phone is on.

Generally, SMS and phone can be used normally.

Internet access requires a mobile phone to open the network to receive the signal of the network channel.

Hope to adopt!