Why is Unicom's recharge unsuccessful?

Unicom's number has been recharged successfully, and there will usually be SMS reminders. It is suggested to verify whether its number is still in arrears, or set automatic interception on the mobile phone, which will intercept the short message of 100 10.

Tips: Take Jiangsu Province as an example. There may be differences in policies among provinces and cities, and the attribution policy shall prevail.