Check Apple Imei |best| -

This is the safest, free method provided directly by Apple to check warranty status.

If you have an iPhone XS, XR, or newer (excluding SE), you have Dual SIM. IMEI 1 is for the physical SIM. IMEI 2 is for the eSIM (digital SIM). check apple imei

The IMEI is used to identify the device on cellular networks. The Serial Number is used by Apple to track the device for warranty and manufacturing purposes. Both can identify the specific unit. This is the safest, free method provided directly