What does a cell phone space card mean? Introduction of mobile phone space card.

1, the space card refers to the general stored-value card, which does not need registration, real-name authentication and ID card.

2.SIM card, the abbreviation of SubscriberIdentityModule, is translated as customer identification module, also known as smart card and user identification card. GSM digital mobile phone can only use this card. It stores the information of digital mobile phone customers, encryption keys and user's phone book on a computer chip, which can be used to identify GSM network customers and encrypt voice information when customers talk. The SIM card can be plugged into any GSM mobile phone, and the communication expenses generated by using the mobile phone are recorded in the customer account uniquely identified by the SIM card. The SIM card obtained when accessing the network for the first time is embedded in a large card. Mobile phones generally use standard cards (small cards appear gradually). Remove the small card from the big card and insert it into the SIM card slot of the mobile phone.