The eSIM (embedded SIM) on the Xiaomi 14T is a digital SIM card technology that allows a device to connect to a mobile network without needing a physical SIM card. Instead, eSIM is built directly into the device and can be programmed and activated over the air by the carrier, you can switch networks or manage multiple network profiles on one device more easily. To addeSIM, please refer to the following steps: 1. Openthe [Settings]App; 2. Go to [Mobile networks]; 3. Choose [Turn on eSIM],then your phone will pop up an option; 4. Select [OK]; 5. Tap the [Add eSIM]; 6. Then, scan the QR code provided by your carrier. Note: The eSIM technology allows easy switching between profiles, requiring attention to privacy security.