How to send short messages in groups?

The operation steps of mass SMS are as follows:

Operating environment: Meizu 18, Flyme 10 system, etc.

1, open the SMS.

2. Click the Edit SMS button in the upper right corner.

3. Click the "+"on the right.

4. Click the button behind the contact in the pop-up page.

5. After selecting, click "Add" directly below.

6. Finally, just enter the content and click the send button on the right.