An eSIM card, also known as an embedded SIM or electronic SIM, is a digital SIM card that is built into a device, such as a smartphone, tablet, or wearable device. It eliminates the need for a physical SIM card and allows users to switch between different mobile network operators without having to physically swap SIM cards.

The information stored on an eSIM card is mainly related to the user's mobile network subscription and authentication credentials. Here are the important pieces of information typically stored on an eSIM card:

International Mobile Subscriber Identity (IMSI): This is a unique identifier assigned to a subscriber by the mobile network operator. It helps identify the user's subscription and allows the network to authenticate the user.

Authentication Key (Ki): It is a secret key stored securely on the eSIM card, used for authentication purposes between the mobile device and the mobile network operator.

Profile Information: [/b]The eSIM card contains multiple profiles, each representing a mobile network operator. Each profile includes details such as the network's name, access codes, security parameters, and other relevant information necessary for connecting to the respective mobile network.

[b]Encryption Keys: The eSIM card stores encryption keys used for secure communication between the mobile device and the mobile network. These keys help protect the confidentiality and integrity of the data transmitted over the network.

Mobile Network Operator's Information: The eSIM card may also store additional information related to the mobile network operator, such as contact details, customer support information, service packages, and network-specific settings.

It's important to note that while the eSIM card contains crucial information for connecting to and authenticating with mobile networks, it does not typically store personal data or user-specific information such as contacts, messages, or media files. Those types of data are usually stored on the device's internal storage or cloud services.