I'd like to see a detailed list of telecom supplementary cards. What's the procedure for going to the business hall?

You can bring your mobile phone and owner's ID card to the telecom business hall to inquire about the telecom card details of the random verification code. You can also log in to the telecom online business hall with your mobile phone password, and query the detailed list with the random verification code. For more service benefits, click on "official website" customer service 220 below to answer your questions.