Hardware specs often hide useful features behind boring wording.

Translation:
Single Nano SIM = one physical SIM slot
eSIM = programmable embedded SIM profile support
Real-World Use Case:

You keep your primary carrier on the physical SIM, then provision a secondary plan digitally for travel, testing, or work.

Why It Matters:
Faster carrier switching
Better travel workflow
Reduced physical SIM handling
Cleaner dual-line setup on supported devices
Reminder:

Implementation varies by region and manufacturer, so always verify the exact model.