What Is eUICC, and How Does It Work?

eUICC stands for Embedded Universal Integrated Circuit Card. It refers to the hardware component that enables eSIM functionality. The eUICC securely stores multiple carrier profiles and manages subscriptions. It allows for remote provisioning of these profiles, meaning users can change carriers or plans without needing to physically replace a SIM card.

eUICC vs eSIM

Understanding the differences between eUICC and eSIM is crucial for modern connectivity. While both enhance mobile technology, they serve distinct roles. Here are the key differences.

eUICC is the hardware that stores and manages operator profiles, whereas eSIM is the digital technology that enables mobile network connectivity.
eUICC allows for remote provisioning of multiple SIM profiles, while eSIM facilitates network connections and profile switching.
eUICC is physically embedded in the device, whereas eSIM refers to the digital functionality provided by the eUICC.
eUICC operates in the background to manage connectivity, while eSIM enables users to switch profiles and activate services directly.

To keep in mind

If you encounter any eUICC-related errors on your device, such as difficulties in downloading or activating an eSIM profile that prevent network connectivity, we recommend turning off any inactive eSIMs and removing expired ones that you no longer intend to use. This issue may arise because you have reached the limit of installed and activated profiles on your eSIM-compatible device.

Please note that specifications can vary by model.

Troubleshooting Tips

If you have reached the limit of eSIM profiles installed on your device, follow these steps to delete an eSIM that you are no longer using.

How to Delete a Holafly eSIM on iPhone (iOS)

To delete an eSIM, go to Settings > Tap on Mobile Data or Cellular > Select the eSIM you want to remove > Scroll to the bottom > Tap on Delete eSIM.