How to check the arrears status of China Unicom number?

China Unicom has the following methods to check mobile phone arrears:

1. Log in to the online business hall to check arrears through the mobile phone number and service password;

2. Log in to the mobile business hall to query the current available balance (including arrears) information of the account;

3. Send "CXYE" or "YE" to 10010 via SMS to query the current available balance information of the account;

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4. The machine owner shall bring the original valid certificate to the self-built business hall in the place of residence.