What is a UIM card? How much?

The mobile phone cards of China Mobile and China Unicom are called SIM cards, and the mobile phone cards of China Telecom are called UIM cards. UIM (User Identity Model) user identification module is a mobile communication terminal user identification and encryption technology initiated by China Telecom and supported by the International CDMA Group (CDG). It supports dedicated authentication encryption algorithm and OTA technology (Over The Air), and can update and manage the data on the card through the wireless air interface. The function of the UIM card is similar to the SIM card used in GSM mobile phones. It can perform user identification and communication encryption, and can also store user personal information such as phone numbers and short messages. At the same time, the UIM card adopts the convenient usage method of one SIM card and one number. If the phone is unfortunately lost, others cannot use other cards. The user only needs to have a personal UIM card and insert it into any mobile phone equipped with a UIM card interface. It can be applied on mobile phones. Not counting phone charges, China Telecom will charge you 20 yuan for the UIM card alone.