Is it free as long as the phone can hold Fetion SMS?

Hello, the fees for sending short messages and messages through Fetion client are as follows:

For mobile Fetion clients:

If you choose the chat window to send messages, they are all free.

If you choose to send short messages, it is free to send them to your friends in Fetion Mobile. There is a charge for sending to friends or non-friends of China Unicom and Telecom Fetion.

For Unicom and Telecom Fetion customers:

If you choose the chat window to send messages, they are free and unlimited, but the other party needs to log in to Fetion software to receive them. If the other party is not online, the next login will receive it.

if you choose to send short messages, you can send 5 free short messages to your Fetion friends every month. Unable to send Fetion SMS to China Unicom, China Telecom and mobile users who have not been added successfully. If you exceed the number of free text messages, you can exchange points for short message packages.

in addition, if you use the mobile phone client, you will normally charge the mobile data traffic fee.

please refer to it. thank you.