If you've ever swapped a SIM card at an airport kiosk, paid €15 for 3 days of roaming, or lost a tiny piece of plastic somewhere in your bag — you already understand why eSIM exists. Physical SIM vs eSIM — what actually changes A traditional SIM card is basically a tiny secure chip with your carrier credentials hardcoded onto it. When you swap carriers, you swap the physical chip. An eSIM (embedded SIM) is the same secure chip — but it's soldered directly into your device, and the carrier credentials are written to it remotely via a process called Remote SIM Provisioning (RSP). No physical swap. No new card. Just a QR code or push notification that writes a new carrier profile onto the embedded chip.…