How to change the package of telecom hang-up SMS?

Telecom on-hook SMS users can apply for package change in the package change interface once a month. If you change it many times, you can use this machine to dial the hotline to make changes. The application for package change still uses the service according to the original package tariff of the current month, and the application for new package will take effect the next month. The deadline for website package change operation is 20:00 on the last day of each month, and the deadline for hotline change operation is 16:00 on the last day of each month. For more service benefits, click on "official website" customer service 222 below to answer your questions.