An eSIM (embedded SIM) is a modern, digital alternative to the physical SIM card. The necessary chip is already integrated into your phone, eliminating the need for handling small plastic cards or ejector pins.
How it works: Think of it like a digital download. Once you purchase a plan, you'll instantly receive a QR code via email. By scanning this code in your phone's settings, a "digital data profile" is installed, which then connects you to local mobile networks when you're abroad.
The main advantage: This technology supports Dual SIM functionality. This means you can enjoy affordable high-speed data while simultaneously keeping your primary home number active. This is perfect for receiving important calls and SMS verification codes, such as bank OTPs.