The SIM card (Subscriber ldentity Model user identification module) is also called a smart card and a user identification card. A SIM card must be installed on a GSM mobile phone before it can be used. It can be used to ensure the normal communication of users and prevent eavesdropping on parallel machines and calls. In addition to mobile phones, SIM cards are also widely used in bank POS terminals. The SIM card connector is suitable for reading the SIM card and is an important part of ensuring user information security. TXGA is a professional SIM connector manufacturer, focusing on providing customers with high-quality and reliable connector products for fifteen years. Order online, support no worries for returning goods within seven days after the worry-free after-sale, click to enter [product center] to buy.
There are five modules inside the SIM card. Each module corresponds to a function, including: microprocessor, program memory, working memory, data memory and serial communication unit. After the five modules are glued to the copper interface of the SIM card, they must be integrated into an integrated circuit, otherwise the connection between the chips may become an important clue for illegal access and theft of the SIM card. Affect its safety.
The SIM card uses a new MCU and memory management structure, so the processing function is greatly enhanced. The logical structure of its intelligent features is a tree structure. All characteristic parameter information is expressed in data fields. There are three types of data information stored in the SIM card, one is the identity information of the card holder and the business information that the SIM card will provide in the future; the second is the application information of GSM; the third is the information used by the GSM application. The three types of information constitute the entire contents of the SIM card. The storage capacity of the SIM card is 3kB, 8kB, 16kB, 32kB, 64kB, etc. Currently it is mostly 16KB and 32KB. Although the capacity is not large, the core information it stores is very important, requiring a sensitive and durable SIM card connector to read the information.
TXGA has been devoted to the development, production and sales of precision connectors for fifteen years. There are a large number of SIM card connector connectors in stock, providing professional installation technical guidance, so you can worry-free procurement.
