What should I do if the arrears of Unicom number are cancelled?

Unicom needs to settle the fee after it owes money. When the mobile phone number exceeds the payment period of 90 days and the arrears and liquidated damages are not paid, the number will be cancelled. If the number is cancelled due to arrears, the arrears should be settled as soon as possible, otherwise the number will be blacklisted automatically by the system after three months of arrears. In addition, because registered customers in real-name registration system, if they don't pay the fees, the number under the same certificate can't handle other businesses (for example, they can only handle payment business and can't add new businesses), and the same certificate can't handle new users in the future.