How to transfer the phone bill from one mobile phone to another?

If you mean that the balance of one number needs to be transferred to another number, the phone bill in the account can only be used by yourself and cannot be transferred to other users.

1 If you want to cancel the number with the balance in the prepaid account, you need to go to Unicom business hall with the owner's certificate, and the balance can be transferred to other Unicom number accounts in different places.

If the number of post-paid users still has pre-stored phone charges (prepaid, grant and phone charges charged by a card cannot be refunded), they can also be refunded.

Different cities have different commercial policies, and the specific situation is subject to local policies.