eSIM technology replaces physical SIM cards in modern smartphones

The mobile industry is transitioning from physical plastic SIM cards to eSIM technology, also known as embedded SIM. Unlike traditional SIM cards that are removable, an eSIM is a chip soldered directly onto a device's motherboard during manufacturing.

This technology allows users to activate cellular plans digitally by downloading a profile via software, often through a QR code or a direct link from a carrier. This eliminates the need for physical card swaps or visiting retail stores for activation. Key advantages include the ability to store multiple digital profiles on a single device, which facilitates using separate numbers for personal and professional use, and allowing manufacturers to design thinner devices by removing the physical SIM tray.

The shift has been driven by major industry players; for instance, Apple began supporting eSIM with the iPhone XS in 2018 and has released iPhone models in the United States without any physical SIM slots since 2022. The GSMA standardized this technology in 2016, marking a move toward a more seamless, software-based approach to mobile connectivity.