1. The computer is not connected to the Internet or its access area is limited;
2. The version of IE is too low, the number of password bits is insufficient, and the IE parameters are set incorrectly;
3. After submitting the points exchange order, the submission is interrupted or failed due to network communication failure (too slow network speed, dropped modem, etc.). );
4. The redemption of accumulated points on that day exceeds the limit;
5. The balance of points is insufficient or has not reached the threshold of points exchange;
6. When the account is turned off and cancelled, the points will be frozen. It is suggested to restart or cancel the account cancellation.
7. Your mobile phone number has expired.
If the above situation is excluded, it is suggested that you can contact Unicom's manual customer service for verification. The actual situation is subject to local policies.