An eSIM or embedded SIM is a programmable chip that is embedded in a mobile device and serves the same purpose as a traditional SIM card. Unlike a physical SIM card, an eSIM does not need to be physically removed from or inserted into the device as it is built into the device itself.
With an eSIM, users can activate a data package without having to buy a physical SIM card or visit a store. The eSIM is programmed via a QR code or a website with the details of the data package. This enables a more streamlined and convenient process for activating and managing mobile plans.
For example, users can easily switch between different data packages on different eSIMs without having to physically replace the SIM card. In addition, eSIM technology enables smaller and more compact devices, as no conventional SIM card slot is required.