What Is an IMEI Number & Why Does It Matter?

The IMEI number (International Mobile Equipment Identity) is a unique 15-digit code that identifies your mobile device on a cellular network. It helps track, verify, and protect your phone and is essential for security, authentication, and eSIM for iPhone setup. In this blog, you’ll learn what an IMEI number is, what the IMEI number is used for, and where the IMEI number is located on your device. You’ll also find easy steps on how to check the IMEI number on an iPhone or find IMEI on Android, plus key differences between IMEI, IMEI2, MEID, ICCID, IMSI, and EID. The guide also covers IMEI myths, scams, and security tips to protect your phone when using international eSIM plans or the best eSIM for travel. Whether you’re activating a new SIM, setting up an eSIM, or buying a used phone, understanding your IMEI number ensures your device stays secure and connected, wherever you go.

When getting a new mobile device, whether it’s a smartphone or tablet, you’ve probably noticed a long string of numbers printed on the box, under your phone’s settings, or near the SIM tray. That unique code is your IMEI number, short for International Mobile Equipment Identity.

Every device that connects to a mobile network has one, and it’s far more important than most people realize. Your IMEI isn’t just another technical detail; it’s your phone’s digital fingerprint. It helps identify your device, enables network access, and even protects you if your phone is lost or stolen.

Understanding what an IMEI number is can save you from future headaches. From verifying authenticity before buying a secondhand phone to helping your carrier block a stolen device, your IMEI plays a key role in how your phone communicates securely with the network.

In this blog, we’ll break down what the IMEI number does, where the IMEI number is located on your phone, how to check it on both iPhone and Android, and what the IMEI number is used for. You’ll also learn how it connects with modern technology like eSIM for iPhone and why it matters for global travelers using international eSIM plans or the best eSIM for travel.

What Is an IMEI Number?

The IMEI number (International Mobile Equipment Identity) is a unique 15-digit code assigned to every mobile device that connects to a cellular network. Think of it as your phone’s digital ID. No two devices in the world share the same IMEI.

Whenever you make a call, send a message, or connect to the internet through mobile data, your carrier uses this number to identify your device on its network. So, even if you switch SIM cards, your phone can still be recognized by its IMEI.

Why does it matter?

Your IMEI number helps mobile networks, phone manufacturers, and even law enforcement identify your device. If your phone is ever lost or stolen, the IMEI can be used to block it from being used on any network, rendering it useless to thieves.

For travelers using eSIM for iPhone or Android, the IMEI also plays a role in activating your plan. Carriers use it to check device compatibility before setting up international eSIM plans.

In short, understanding what the IMEI number does helps you protect your device, verify its authenticity, and stay connected safely, whether you’re at home or abroad.

How IMEI Differs from IMEI2 / MEID / IMSI / ICCID / EID

Your phone has several identification numbers, such as IMEI, IMEI2, MEID, IMSI, ICCID, and EID. While they may sound similar, each serves a different purpose. Knowing the difference can help you understand how your device connects to networks and manages SIM or eSIM functions.

Here’s a quick comparison to keep things simple:

Example:

If you’re using a dual SIM iPhone with one physical SIM and one eSIM, your phone will show both IMEI and IMEI2 numbers. The eSIM also has an EID, which your carrier uses to link your digital plan.

What Is an IMEI Number Used For?

Your phone’s IMEI number is more than just a technical code; it’s a powerful tool that helps identify, protect, and manage your device. Here are the main ways it’s used in everyday life:

1. Identifying Your Device on a Network

When you connect to a mobile network, your carrier uses the IMEI number to identify your phone. Even if you swap SIM cards, your device remains the same in the system. This ensures secure access to mobile services and helps prevent fraud or network misuse.

2. Blocking Lost or Stolen Phones

If your phone is lost or stolen, reporting its IMEI to your carrier allows them to block it from connecting to any network. This makes the device useless for thieves, one of the most important reasons why the IMEI number matters so much.

3. Checking Device Authenticity

When buying a second-hand/refurbished phone, checking the IMEI on official websites or carrier databases ensures the device isn’t fake or blacklisted. It’s an easy way to confirm the phone’s legitimacy before buying.

4. eSIM and Network Activation

Carriers use your IMEI and EID (for eSIMs) to activate your plan. If you’re setting up an eSIM for an iPhone or Android, the IMEI confirms that your device is compatible with international eSIM plans or the best eSIM for travel.

5. Law Enforcement and Device Tracking

In extreme cases, police and mobile networks can use IMEI to locate or disable stolen devices. This makes it an essential layer of protection if your phone goes missing abroad.

In short, when people ask, “What can you do with an IMEI number?” the answer is simple - you can verify, secure, and protect your phone anywhere in the world.

5 Simple Ways to Find Your IMEI Number

Knowing where the IMEI number is located on your phone helps with everything from device setup to theft reporting and eSIM activation. Whether you’re using an iPhone, Android, or an eSIM-enabled device, there are several easy ways to find it.

1. Using the Dial Code

This is the fastest method and works on almost all phones:

Open the Phone app.

Dial *#06#.

Your IMEI (and IMEI2, if you have dual SIM or eSIM support) will appear on the screen instantly.

2. On iPhone

To check your IMEI directly from the settings:

Go to Settings → General → About.

Scroll down to view the IMEI, IMEI2 (for dual SIM), and EID (for eSIM for iPhone users).

You can also find it on the SIM tray or the back of the box.

3. On Android

Most Android devices follow a similar process:

Go to Settings → About Phone → Status → IMEI Information.

You’ll see one or two IMEIs depending on whether your device supports dual SIM or eSIM.

You can also use the dial code *#06# as a shortcut.

4. On the Phone Box or Receipt

If your phone isn’t with you, the IMEI is usually printed on:

The retail box label.

The purchase invoice or carrier receipt.

The warranty or insurance documents.

5. Through Carrier Account or Finder Apps

If your phone is linked to your carrier account or a device finder app (like “Find My iPhone” or “Find My Device”), you may also find the IMEI number listed under device details.

Top 9 Important IMEI Security Tips to Keep Your Phone Safe

Your IMEI number isn’t just a random code; it’s like your phone’s fingerprint. It helps keep your device safe and lets carriers block it if it’s ever lost or stolen. Whether you’re using a physical SIM or an eSIM, protecting your IMEI helps prevent phone cloning, fraud, and misuse.

1. Never Share Your IMEI with Anyone

Never post your IMEI number online or share it with strangers. Only give it to your network provider or phone brand’s support team if they ask for it.

Example: Some fake “unlock” websites or giveaway pages ask for your IMEI, don’t trust them! Always use official carrier websites or manufacturer portals for verification.

2. Report a Lost or Stolen Phone Right Away

If your phone goes missing, contact your carrier and the police immediately with your IMEI number. They can block it so no one can use your phone on any network.

This is especially important when you’re traveling abroad with an eSIM; blocking the IMEI stops anyone from reusing your phone with another SIM card.

3. Save Your IMEI in a Safe Place

As mentioned previously, you can find your IMEI by dialing *#06# or checking - Settings → About Phone, and save it somewhere safe, like your notes app, email, or cloud storage.

If you use an eSIM, also save your EID number. You’ll need both if your phone is ever lost or you need to reactivate your service.

4. Use Trusted Websites to Check IMEI

If you want to verify your IMEI status, use official brand or carrier websites (like Apple, Samsung, or your telecom provider).

Avoid random “free IMEI check” tools; they may store or misuse your information.

5. Keep Your Phone Updated

Install the latest software and security updates as soon as they’re available. Updates fix bugs and protect your phone from hackers.

Avoid rooting or jailbreaking your phone; it removes built-in protections and can expose your IMEI and personal data.

6. Turn On “Find My Device” Features

Enable Find My iPhone (for iOS) or Find My Device (for Android). These tools let you track, lock, or erase your phone remotely if it’s lost or stolen.

It’s one of the simplest ways to protect your personal data, even when your phone isn’t in your hands.

7. Use Safe Networks

Stick to 4G or 5G networks whenever possible; they’re more secure than older 2G or 3G networks.
When using public Wi-Fi, connect through a VPN to keep your data private and safe.

8. Go to Authorized Repair Centers Only

When your phone needs fixing, visit only official or trusted repair shops.

Some unverified places might tamper with your IMEI or install unsafe parts. Always ask for a receipt or service record after the repair.

9. Lock Your Phone Properly

Set a PIN, password, fingerprint, or face unlock, and turn on auto-lock after a short time. This keeps your photos, chats, and accounts secure even if someone gets hold of your phone.

4 Common IMEI Myths & Scams (and How to Avoid Them)

Many people misunderstand what their IMEI number really does — and that confusion has given rise to plenty of myths and scams. Let’s clear up the most common ones so you can protect yourself and your device.

Myth 1: “Your IMEI is the same as your SIM.”

False. If you’ve ever wondered, “Is IMEI the same as SIM?”, the answer is no.
Your IMEI identifies the phone itself, while the SIM identifies your mobile account. Even if you change SIM cards or use an eSIM for iPhone, your IMEI stays the same.

Myth 2: “Changing your IMEI can improve your phone’s performance.”

False. Changing or tampering with your IMEI is illegal in most countries. It doesn’t improve performance; it only risks your phone being blacklisted and permanently blocked from networks.

Myth 3: “Sharing your IMEI number is harmless.”

False. Scammers can clone your IMEI and use it on stolen or fake devices, linking fraudulent activity back to you. Only share your IMEI with your carrier, manufacturer, or trusted repair service.

Myth 4: “All phones have only one IMEI.”

False. Dual SIM or eSIM-enabled phones often have two IMEIs, one for each line (IMEI and IMEI2). This allows your phone to manage multiple carriers or international eSIM plans at once.

Scam to Watch: Fake “IMEI Check” Websites

Some sites claim to verify your phone’s warranty or unlock status, but are designed to steal your IMEI information. Always use official carrier or manufacturer sites to check what the IMEI number is used for or verify authenticity.

Quick tip: When checking your IMEI online, look for websites with HTTPS security and official branding. If it asks for payment or personal data upfront, it’s a red flag.

Your IMEI number is essential, but it’s also sensitive; treat it like your bank account number. Knowing what the IMEI number does helps you use it wisely while staying safe from fraud.

Best eSIM for Travel & International eSIM Plans

Understanding your IMEI number is just one part of keeping your device secure and travel-ready. The next step is ensuring reliable global connectivity, and that’s where an eSIM for iPhone or Android becomes invaluable. If you’re exploring the best eSIM for travel & international eSIM plans, Jetpac stands out as a simple, secure, and flexible choice.

Why Jetpac?

Global reach: One eSIM setup, usable in 200+ destinations with easy top-ups per country or region.

Always connected: Switches between multiple local networks automatically for 24/7 coverage.

Affordable: Up to 70% cheaper data plans than standard roaming charges.

Transparent pricing: No bill shocks, 100% upfront payment, and no hidden charges.

Unlimited hotspot: Share data freely across devices without data restrictions.

Free essentials: Stay connected on WhatsApp, Google Maps, Grab, and Uber even if your data runs out.

5G ready: Fast, stable connections in 50+ countries.

Voice Cakking: Make international calls from just $1.99 for 5 minutes.

With Jetpac, you get more than just connectivity; you get peace of mind knowing your data, apps, and device remain secure wherever you travel. It’s the perfect companion for those seeking the best eSIM for travel & international eSIM plans, combining flexibility, affordability, and reliability for global explorers.

FAQ

How do I find my IMEI number?

You can find it by dialing *#06# on your phone, checking Settings → About Phone, or looking on the box or SIM tray. For detailed steps, see our guides on how to check the IMEI number on an iPhone or find IMEI on Android.

Is your IMEI your SIM card?

No. If you’re wondering, “Is IMEI the same as SIM?”, the answer is no, your IMEI identifies the device, while your SIM identifies your network account.

Do eSIMs have IMEI numbers?

Yes. Phones with eSIM for iPhone or Android have an IMEI linked to the device and an EID for the digital SIM chip. Both are used for international eSIM plans and activation.

What happens if you give someone your IMEI number?

Avoid sharing it publicly. Scammers can clone or misuse your IMEI to register stolen devices or fake identities.

Do iPhones have an IMEI number?

Yes. All iPhones have an IMEI, and dual-SIM or eSIM for iPhone models display two — one for each active line.

Why would someone need my IMEI number?

Carriers, manufacturers, or police may need your IMEI to track, verify, or block your phone if it’s lost or stolen.

Can an IMEI be tracked?

Yes. Carriers and law enforcement can use the IMEI to locate or block a phone, even if the SIM or eSIM is removed.