With the growing adoption of embedded SIM (eSIM) technology, many travelers and tech enthusiasts have come across the term "eUICC." But what exactly is eUICC, and how does it differ from eSIM? In this article, I'll break down the key differences and how they impact connectivity, especially for travelers looking for flexible mobile data options.
eUICC explained
Table of Contents
What is eUICC?
eUICC (Embedded Universal Integrated Circuit Card) is a technology that allows a single SIM or eSIM to store multiple mobile network profiles. Unlike traditional SIM cards that are locked to a single carrier, eUICC-enabled eSIMs can be remotely updated, allowing users to switch networks seamlessly.
What is eSIM?
eSIM (Embedded SIM) is a digital SIM embedded into a device that provides mobile connectivity without the need for a physical SIM card. eSIMs use eUICC technology to enable network switching and remote provisioning. It can be said that eSIM is only one player in the broader eUICC ecosystem.
Why eUICC Matters
The possibility of using multiple networks gives users more control. Users can now look for the best deals that suit their needs from different providers. This is especially useful for frequent travelers as eUICC-enabled eSIMs offer significant advantages:
- Seamless Carrier Switching: Switch to local networks in different countries without needing a new SIM. This makes for a more hassle-free holiday experience.
- Remote Management: Easily activate or change data plans via an app without visiting a store. Topping up is done like the standard online shopping flow.
- Safekeeping and Convenience: No need to carry multiple SIM cards or a SIM card ejector. This also minimises the risk of losing your physical SIM cards.
- Price-Friendly: You get access to local networks and avoid footing roaming bills with your primary provider.
eSIM Terms You Need to Know
People confuse some things with others. For accuracy, these are the simple definitions of the important stuff:
eUICC: Enables different profiles from multiple Mobile Network Operators (MNO) or Mobile Virtual Network Operators (MVNO) to be stored on a SIM card or eSIM. This also enables remote provisioning/activation.
MNO: The accurate, technical term for what people usually refer to as "telcos, carriers, operators".
MVNO: White-labelled MNOs - in essence, they get their product from MNOs and resell it legally under their own brand.
eSIM: An embedded chip that stores your eSIM profiles.
eSIM Profile: Colloquially known as "eSIM", eSIM profiles are the virtual SIM cards you get from MNOs to connect to their networks.
Dual-SIM: This feature allows a mobile device to operate two active lines at the same time. That is why you can store up to 8 eSIM profiles but only use 2 active eSIM profiles at once.
Mobile Plan: Refers to the type of contract (mobile number, mobile data, data roaming, calls, SMSes, etc) that comes with the eSIM profile. Depending on the operators, eSIM profiles can only have one or multiple mobile plans.
Can All eSIMs Use Multiple Providers?
Yes, absolutely. Going back to the technical terms, an eSIM should be able to store multiple eSIM profiles. The maximum capacity depends on the profile storage designed by the device manufacturer. However, especially for US users, you might have heard complaints along the lines of "my eSIM can only use so-and-so's eSIM".
Well, this is not actually correct.
The issue lies with the device's network status. Network-locked devices can only use a specific provider's services only. Here's how you can check for your network status and how to get your devices unlocked.
How the Industry Uses the eUICC and eSIM Technology
eSIM is actually hardware. Meaning, devices with no eSIM feature can also use eSIM technology if they have the necessary hardware. That's what companies like esim.me or 5ber are doing. They offer "SIM" cards with an eSIM chip that when "embedded" in the SIM card slot, acts like any other eSIM. 5ber is no longer operational, but there are other operators offering the same technology.
Any Difference Between Their "SIM" Cards and Normal eSIMs?
That's the beauty of it - there's no difference in terms of its performance. Here are some points to consider:
- Affordable Upgrade: Upgrading your device to be eSIM-compatible costs a fraction of an eSIM-compatible device, which tends to be mid-to-high-range.
- Keep Your Device: You can continue using your current device instead of purchasing an eSIM-compatible device.
- Similar Experience: Inserting these SIM cards is the same as other SIM cards. Afterwards, you will be given instructions to set up an eSIM profile(s), giving you a taste of eSIM technology.
- Familiar Switching: Transfering eSIMs from one device to another takes more steps and a learning curve while switching this type of SIM card is something that most mobile device users are familiar with.
- "Lasts Longer": Unless you're using an Apple device with iOS 16 or newer, you're likely required to delete your eSIM profile from one device before being able to transfer it to a new device. Some eSIM profiles are valid for one-time installation only; as such, you might be required to contact your providers for a new QR code or Activation code.
Eskimo eSIMs can be re-installed up to 5 times. If you've reinstalled more than that, a purchase of our data plan grants you another QR code, ready for another 5 times of re-installation!
How Eskimo eSIM Uses eUICC Technology
Eskimo eSIM leverages eUICC to provide travelers with global connectivity across 130+ countries. This means that you can switch between local Tier 1 networks at a whim. Our 2-year validity and data rollover feature ensures users can enjoy long-term flexibility without worrying about expiring data.
Conclusion
eUICC is the backbone technology that makes eSIMs truly powerful by enabling remote carrier switching and profile management. While eSIM refers to the embedded SIM itself, eUICC is what allows it to function dynamically. For travelers, this means more freedom, flexibility, and cost-effective connectivity solutions.
Looking for a reliable eSIM solution? Try Eskimo eSIM and stay connected globally without the hassle of swapping SIM cards.