When will the traffic erased with the traffic eraser go back?

According to the information provided by you, if you receive a short message reminding that the phone bill has been returned after using the traffic eraser service, it means that the phone bill has been returned. If you can't find it, don't rule out that it is caused by using the traffic charges you generated before. I suggest you contact Unicom's artificial customer service to assist in the inquiry. The specific situation is subject to local policies.