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Why is Unicom card restricted?

If voice calls are restricted, there may be the following reasons: 1. When the current balance of the number is insufficient or in arrears, the voice call will be restricted, and it is recommended to recharge the payment in time; 2. Call barring function is set on the mobile phone. It is suggested to cancel the call barring function in the "Settings" of the mobile phone. If the above situation has not been solved, it is recommended to contact the local manual customer service for handling.