The mobile service password is a credential that you need to provide when you obtain services from a telecommunications operator (e.g. China Telecom, China Mobile, China Unicom). The service password filled in when activating Bai Tiao by completing a task is the operator service password. The operator service password is the identification password provided by the operator to the user, consisting of 6 Arabic numerals. If you forget the service password, please call the operator's customer service number to inquire or reset the password. Warm reminder: Starting from November 19, 2018, the Bai Tiao activation method through "doing tasks" will be offline. It is recommended to activate Bai Tiao through other methods