What Is an EID Number? How to Find It for eSIM Setup
Learn what an EID number is, why eSIM providers may ask for it, and how to find it on iPhone, Pixel, and Samsung Galaxy devices.
What Is an EID Number? How to Find It for eSIM Setup
An EID number is the identifier tied to the eSIM hardware inside a compatible phone, tablet, or connected device. In simple terms, it helps identify the embedded SIM component that can store downloaded eSIM profiles. Most travelers will not need to type the EID manually when installing a travel eSIM by QR code or app flow, but it can matter during support checks, carrier troubleshooting, device compatibility review, or manual activation.
If you are buying mobile data for a trip, the EID is not the same thing as your phone number, IMEI, ICCID, SIM PIN, or QR code. It does not give you data by itself. It is one piece of device identity used in the broader eSIM ecosystem. The practical goal is to know where to find it, when not to share it casually, and what to check if an eSIM installation fails.
EID Meaning in Plain English
EID commonly stands for eUICC Identifier. The GSMA describes eSIM as a global specification for remote SIM provisioning, where a mobile subscription can be securely downloaded to an embedded SIM inside a device (GSMA eSIM). The EID identifies that embedded SIM component. It is usually a long numeric identifier shown in the device settings or printed in some device information screens.
The important word is "identifier." An EID is not a password, but it is still device-specific information. Treat it like other account or device identifiers: share it only with a legitimate carrier, eSIM provider, device maker, or support team when needed. If someone asks for it in a random message, do not provide it until you have verified the support channel.
For everyday travel eSIM installation, most users interact with a QR code, activation code, or in-app install flow instead of typing an EID. The EID becomes useful when a support agent needs to confirm that the phone's eSIM hardware is visible, when a carrier has to target an activation to the correct embedded SIM, or when you are checking whether the device can support the plan you purchased.
EID vs IMEI, ICCID, and Phone Number
Travelers often mix up device identifiers because they appear near each other in settings. They serve different jobs.
| Identifier | What it identifies | Why it matters |
|---|---|---|
| EID | The embedded SIM/eUICC component | eSIM provisioning and support |
| IMEI | The mobile device radio hardware | Device identity, compatibility, network allowlists |
| ICCID | A SIM profile or SIM card | The specific SIM subscription profile |
| Phone number | A line or calling identity | Calling, SMS, account verification |
The EID belongs to the eSIM-capable part of the device. The IMEI identifies the device itself for mobile-network purposes. The ICCID identifies a SIM profile once it exists. A phone number identifies a service line, and many data-only travel eSIMs do not include a regular voice number. ACE Mobile's guide on whether travel eSIMs work for calls and SMS explains that data-only distinction in travel terms.
This difference matters when contacting support. If an activation email asks you to scan a QR code, the EID may not be needed. If support asks whether your phone can accept an eSIM, they may ask for the model, IMEI, EID, or screenshots from settings. Giving the wrong identifier can slow down troubleshooting.
When You Might Need Your EID Number
You may need the EID in four common situations. First, a carrier or provider may need it for manual eSIM provisioning. Second, a support team may use it to confirm that the embedded SIM is recognized by the device. Third, a business or managed-device administrator may need it when preparing a fleet of eSIM-capable phones. Fourth, a traveler may use it during troubleshooting when a QR code was scanned on the wrong phone or an installation stalled.
You usually do not need the EID just to shop for a travel eSIM. Start by checking the exact phone model and whether it supports eSIM. ACE Mobile maintains a device compatibility page for that first-pass check. If your phone is locked to a home carrier, eSIM support alone may not be enough because a locked device may reject another provider's plan.
You also do not need the EID to keep your home phone number. Many supported phones can use Dual SIM, which means one line can remain available while another line handles travel data. Apple documents Dual SIM with eSIM on supported iPhones (Apple Support), and ACE Mobile's guide to using eSIM and physical SIM at the same time explains the traveler workflow.
How to Find the EID on iPhone
On many recent iPhones, you can find the EID in Settings:
- Open Settings.
- Tap General.
- Tap About.
- Scroll to the EID field.
Apple's eSIM travel guidance confirms that supported iPhones can use eSIM while traveling internationally and that eSIM setup is handled through iPhone settings and carrier-provided activation methods (Apple Support). The exact settings labels can vary by iOS version, region, and carrier configuration, so use Apple's current support pages if your screen looks different.
If you do not see an EID field, check three things before assuming the phone is broken. First, confirm the exact iPhone model supports eSIM in your market. Second, update iOS if you are far behind. Third, check whether the phone is managed by an employer or organization that restricts mobile-plan changes. If the phone is older or region-specific, it may not have the eSIM hardware you expected.
Do not confuse the EID with the IMEI fields shown nearby. An iPhone can show multiple IMEIs when it supports multiple lines, but that does not make either one the EID. If a support agent asks for the EID, copy the EID field specifically.
How to Find the EID on Google Pixel
On Pixel phones, the EID is usually found through the SIM or device information settings. Google documents how Pixel phones use SIMs and eSIMs and how users can add or manage mobile service through settings (Google Pixel Help). Depending on Android version, start with:
- Open Settings.
- Tap Network & internet.
- Tap SIMs or Mobile network.
- Look for eSIM details, SIM information, or EID.
Some Pixel screens also expose hardware identifiers under Settings > About phone. Android settings are not identical across carriers and versions, so if the EID is not where you expect, search Settings for "EID" or check Google's current support flow for your model.
If your Pixel supports more than one SIM arrangement, be careful when choosing which line uses data after installation. A common travel mistake is installing an eSIM successfully but leaving mobile data assigned to the home line. ACE Mobile's guide on whether data roaming needs to be on for eSIM explains why the selected data line and roaming switch matter after arrival.
How to Find the EID on Samsung Galaxy
On compatible Samsung Galaxy devices, the EID is generally available in the device status or SIM manager area. Samsung's official support explains how to use an eSIM on Galaxy devices and manage mobile plans through settings on supported models (Samsung Support). A typical path is:
- Open Settings.
- Tap Connections.
- Tap SIM manager.
- Open eSIM or mobile plan details and look for EID.
You may also find device identifiers under Settings > About phone > Status information, depending on the model and software version. Samsung ships many regional variants, so the exact path can differ. If the EID does not appear, confirm that your exact model and region support eSIM; a phone name alone is not always enough.
For travel, the practical Samsung setup checks are the same as iPhone and Pixel: compatible model, unlocked device, stable Wi-Fi during installation, and correct data-line selection afterward. If you are preparing before a trip, read ACE Mobile's how to install an eSIM before you travel and complete the setup steps while you still have reliable home internet.
Why an EID Might Be Missing
If you cannot find an EID, the most likely reason is that the device does not support eSIM, the model variant does not support eSIM in your market, or the settings path is different from the instructions you are following. It can also be hidden by enterprise management or carrier customization. A software update may change where the field appears, but it cannot add eSIM hardware to a device that never had it.
Another possibility is that you are looking at a Wi-Fi-only device or a cellular device that supports physical SIM but not eSIM. Tablets, watches, and laptops vary widely. Do not assume that every "cellular" device has the same eSIM behavior as a recent phone.
If you bought a second-hand phone, verify that it is unlocked and not restricted. An eSIM-capable phone can still fail travel eSIM setup if it is carrier-locked, reported lost, heavily managed, or running outdated software. When in doubt, contact the original carrier or device maker before purchasing a plan.
Privacy and Security: How Carefully Should You Treat EID?
The EID is not a password, and someone cannot normally use it alone to take over your mobile service. Still, it is a persistent device identifier connected to eSIM provisioning. Share it only with support channels you trust. Do not post screenshots that expose your EID, IMEI, ICCID, QR code, activation code, or account email in public forums.
The QR code or activation code deserves even more caution because it may be tied to a specific eSIM profile. If you need help, crop screenshots to show only the error message and non-sensitive settings unless a legitimate support agent specifically requests an identifier. If you are unsure, ask what identifier is needed and why.
For travel, the most secure workflow is straightforward: buy from a reputable provider, install over a trusted Wi-Fi network, avoid sharing activation details, and keep your device protected with a passcode or biometric lock. If an eSIM install fails, use the provider's official support route rather than searching for a random workaround.
Troubleshooting EID and eSIM Setup Problems
If support asks for an EID because installation failed, work through the basics before repeating the same scan:
- Confirm the phone model supports eSIM.
- Confirm the phone is unlocked for another provider's plan.
- Connect to stable Wi-Fi.
- Update the device software if it is far behind.
- Make sure the QR code has not already been used on another device.
- Remove failed or incomplete eSIM attempts only if your provider says it is safe.
- Restart the phone and try the official install flow again.
Do not delete a travel eSIM casually after installation. Some eSIM profiles cannot be reinstalled after deletion without provider intervention. If you are unsure whether a profile is active, contact support before removing it.
If the plan installs but data does not work, the EID is probably no longer the main issue. Check whether the eSIM line is enabled, whether mobile data is assigned to that line, whether roaming is enabled when required, and whether the plan has started. ACE Mobile's article on what happens if you run out of eSIM data can help separate setup failure from exhausted data.
Buying a Travel eSIM After Finding Your EID
Once you know your device supports eSIM, choose the plan by destination, validity, data allowance, hotspot needs, and support expectations rather than by the EID itself. The EID is a technical identifier, not a measure of speed or coverage.
If you are planning an international trip, compare current ACE Mobile plans by destination and data needs. Install before travel when possible, keep the setup email accessible offline, and avoid waiting until you are standing in an airport arrivals hall with weak Wi-Fi.
For most travelers, the EID is something you check once, copy carefully if support needs it, and then ignore. The more important travel habits are confirming compatibility early, keeping your home line and travel data line straight, and testing the plan before you need it for maps, hotel messages, or transit.
FAQ
Is the EID the same as an IMEI?
No. The EID identifies the embedded SIM component used for eSIM provisioning. The IMEI identifies the mobile device radio hardware.
Is the EID the same as an ICCID?
No. The ICCID identifies a SIM profile or SIM card. The EID identifies the embedded SIM hardware that can store eSIM profiles.
Do I need my EID to install a travel eSIM?
Usually no. Most consumer travel eSIM installs use a QR code, activation code, or app flow. Support may ask for the EID if provisioning needs manual review.
Can I share my EID with eSIM support?
Yes, if you are using the provider's official support channel and they need it for troubleshooting. Do not post it publicly.
Why does my phone not show an EID?
The phone may not support eSIM, your regional model may differ, the settings path may have changed, or device management may hide mobile-plan information.
Final Thoughts
The EID number is a behind-the-scenes identifier that helps eSIM systems know which embedded SIM they are working with. Travelers do not need to memorize it, but knowing where to find it can make support faster when an installation does not behave as expected. Before buying any travel eSIM, confirm your exact device is compatible, install on reliable Wi-Fi, and keep sensitive activation details private.
