Question about Samsung Galaxy S25

The device supports dual SIM with nano-SIM and eSIM. This is not a hybrid dual SIM system in which a physical SIM and an eSIM can be used simultaneously, but a true dual SIM function with two separate SIM slots (nano SIM + eSIM) that can be operated in parallel. The exact configuration (e.g. whether two physical SIMs are possible) is not explicitly stated in the available data, but the specification "Dual SIM" in combination with eSIM indicates parallel operation. For absolute certainty, I recommend checking the manufacturer's technical documentation.