Why can't I change my mobile phone card package?

3G users, 3G package changes are unsuccessful for the following reasons:

1. The mobile phone has expired and cannot be replaced;

2. The package has been changed in the current month;

3. The mobile phone is in an abnormal service state such as number protection and loss reporting, or is a blacklisted user;

4. From the last day of the month to the beginning of the month, it may affect the use of the package change business;

5. The package cannot be changed from 00: 00 to 24: 00 on the last day of the month;

6.2G prepaid users cannot handle 3G services in the online business hall;

7. The original mobile phone package does not support changing to 3G package. For example, if you participate in Unicom's contract plan, you can only switch from flat package to high package during the contract period, but you can't successfully switch to low package.

If the old 4G users fail to change other packages, the reasons may be: the number is in arrears, the system is turned off, the system is busy, which leads to the failure of acceptance, the 4G national package participates in the contract plan such as deposit and fee delivery, and it is not supported to switch to the 4G combination package during the contract period.