How does Unicom's card package a short message package?

Specific subscription and unsubscribe are as follows:

Three kinds of SMS packages are: 60 messages per month in 5 yuan, 10 yuan/month, 125 messages per month, 300 messages per month in 20 yuan, and the excess will be charged at 0. 1 yuan.

SMS opening mode: send SQDX+ SMS file to 100 10 to open;

Cancellation method: QXDXTC to 100 10.

On the last day of each month, from 20: 00 to 24: 00, SMS package or cancellation application will not be accepted, and it will be handled in the same month and take effect in the next month.

For example, send SQDX20 to 100 10, and 300 short message packets will be opened in 20 yuan every month.