1 If you can find the original head of household, you and the original head of household can go through the transfer formalities with the original valid ID card at the Unicom own business hall to which the number belongs;
2 If you can't find the previous head of household, you need to consult in your business hall, and you may need to provide relevant certification materials such as Cato, payment records and various detailed bills for authentication. The specific situation is subject to local policies.