How to send SMS and add traffic to Unicom card? Effective in the current month

Unicom's 4G package can open half-year traffic packets and idle traffic packets, which will take effect immediately after the half-year traffic packets are successfully opened, and the idle traffic packets will take effect in the current month and the next month. If you want to buy a six-month traffic package that takes effect immediately, you can log in to Unicom's online business hall, and click Self-service Business Handling Internet Traffic for half a year.