What is written on my mobile phone card? I was stopped for sending bad information. What happened?

It may be that the mobile phone number has been stolen, so you can complain directly to the business hall.

SIM card is the key for GSM mobile phone to connect to GSM network. Once the SIM card is removed from the mobile phone, the mobile phone will not be able to enjoy all kinds of services provided by network operators except emergency calls. SIM card can not only be used as a key, but also provide a lot of convenience for users.

SIM card adopts a new single chip microcomputer and memory management structure, and its processing function is greatly enhanced. The logical structure of its intelligent features is a tree structure.

SIM card is a kind of "smart" card conforming to GSM specification, which contains information related to users and is stored at the user side, including:

1, International Mobile Subscriber Identification Number (IMSl). Simply put, it is the phone number of the user. IMSI is the only global code number that can identify users. It uses the network to identify which country, which telecom business department or even which mobile service area users belong to.