1. First, please insert the voice card into your mobile phone, make a phone call or send a text message to activate it. If the words "Enter PIN:" are displayed after the campus package is inserted into the mobile phone, please enter your PIN code (refer to the next section), and the mobile phone will automatically find and enter China Telecom Tianyi network. 2. Users will encounter three passwords when using the Tianyi Campus Card: (1)PIN code: When the phone prompts for the PIN code, please enter the initial PIN code 1234 at any time. (2)PUK code: PUK code is printed on the user card in the network access package. If you enter the wrong PIN code three times in a row, the voice card will be locked. You can unlock it by entering the PUK password. After unlocking, you need to enter a new PIN code. Tips: 10 wrong input of PUK code, the campus package will be permanently locked (unable to unlock). (3) User password: The initial user password of the voice card is 000000. You can call the service number 100 1 to change your password.

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