Does Xiaomi 3 need to surf the Internet when sending text messages?

Xiaomi 3 does not need to connect to the network to send short messages, but it needs to upgrade the network to use free short messages. The following is the specific operation of using and opening free network short messages:

1, turn on the phone, and then enter a text message.

2. Press and hold the menu key to enter SMS settings.

3. Open miui free SMS.

4. In SMS mode, send a free SMS to the number of friends who use Xiaomi mobile phone.

Remarks: miui6 or 7 can only use miui free SMS.