How does Unicom change the package by SMS?

Package change: refers to the business that customers apply to change the package without changing the attributes of postpaid/quasi-prepaid /OCS and 3G/4G customers. After the mobile phone customer changes the package, the original mobile phone number remains unchanged. For example, the post-paid package in 96 yuan was changed to the post-paid package in 126 yuan. Because different packages have different regulations for changing packages, the owner himself holds the original valid certificate to consult the local Unicom business hall. Note: 1. The package needs to be changed to the current package before it can be sold. If the user's previous package was discontinued, it cannot be changed to the old package after the user changes it to the new package. 2. The status of the number is normal, and there is no overdue payment. 3. Agreement customers, during the agreement period, (1): customers who have a contract or a good name may change during the agreement period, and are only limited to handling packages that are not lower than the agreement (or promising the minimum monthly consumption). (2) Month when the agreement expires: Some cities can make an appointment to change the package stalls that are lower than those agreed in the contract plan on the last day when the agreement (or contract) expires. 4. Customization business inheritance: For the optional customization business only applicable to this package included in some packages, when the package or charging method changes, the customization business of the original package will be invalid, and the existing customization business applicable to the new package needs to be customized again. 5. Effective time: The new tariff package will take effect on 1 day of the next business month (unless otherwise stipulated in the package effective rules), and it will still be implemented according to the original package specifications of that month.