What is the usim card?

USIM card is "Universal Subscriber Identity Module", called 3G USIM card. It is a SIM card used in 3G and 4G mobile communication networks. It is an evolved version of SIM card, adding more Storage space to store more contacts, text messages and other personal data.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

USIM card (Universal Subscriber Identity Module), also known as 3G USIM card, is a SIM card used in 3G and 4G mobile communication networks. SIM card is a chip card used to store user identity information. It is inserted into a mobile phone or other mobile device to communicate and authenticate with the mobile communication network.

USIM card is an evolved version of SIM card, which has larger storage capacity and more functions. Compared with traditional GSM SIM cards, USIM cards add more storage space and can store more contacts, text messages and other personal data. In addition, USIM cards also support higher levels of encryption and security mechanisms to provide higher communication security.

USIM cards are usually used in 3G and 4G mobile communication networks, such as WCDMA (Wideband Code Division Multiple Access) and LTE (Long-Term Evolution) networks. It is widely used in mobile phones, tablets and other mobile devices to enable users' communication and data services on mobile networks.

It should be noted that the physical sizes of USIM cards and standard SIM cards are different, so you need to ensure that the device is compatible with the USIM card slot before use.

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