What software does Unicom use to send text messages as long as it doesn't need traffic?

There are many such software, such as Shanda software, Xiaomi's rice chat software and so on. However, both of your mobile phones need to install the same software to find each other through their accounts. The expressions of existing software are large or small, and the uncertainty is usually 5KB. Generally, the mobile phone that sends pictures will be automatically compressed to 300KB, usually 50 KB. Those who send short messages around 100 KB will have even less traffic. Well, don't worry about it. Send 300M text messages a month, as long as you don't write a composition, you can still have 280M left! The traffic is covered by you, only the traffic is deducted, so you can send it at ease.