What software sends short messages for free now, and what kind of software saves the most traffic? Which operation is the simplest?

If you want to send text messages for free, I suggest using Fetion. You can send messages for free without downloading Fetion client. You download a "love message" client, and then set Fetion in the plug-in to update the friend list. You can send messages for free without posting a flying letter in the future. This software uses the technology of breakpoint link, and every time you send a message, it will automatically connect to the network, and it will automatically disconnect when it is finished. Sending a message only needs 3-5KB of traffic, which is much more economical than logging in to Fetion. The important thing is that all the information you send and receive is stored in your mobile phone, just like ordinary text messages.