What Is an eSIM Activation Code and Where Do I Find It?

What Is an eSIM Activation Code and Where Do I Find It?

What Is an eSIM Activation Code and Where Do I Find It?

An eSIM activation code is the text-based credential — an SM-DP+ server address plus a confirmation code — that your phone uses to download and install an eSIM profile when you can't or don't want to scan a QR code. It's issued by your eSIM provider right after purchase, usually inside a confirmation email or the provider's app, and you type or paste it in manually instead of pointing your camera at an image.

This page focuses specifically on that code: what's actually inside it, where to find yours, and what to do if it stops working. For the full tap-by-tap manual-entry screens on iPhone and Android, see our guide to activating an eSIM manually — this article is the reference for the code itself, not a repeat of those setup screens.

QR Code vs. Activation Code: What's the Difference?

There's no functional difference between the two — only a delivery format.

• QR code: a scannable image that encodes a string of text; your phone's camera reads the image and extracts that text automatically.
• Activation code: the same underlying text, handed to you directly so you can type or paste it instead of scanning.

That underlying string typically has two parts:

1. SM-DP+ address – the address of the server (run by your eSIM provider or their carrier partner) that holds your eSIM profile.
2. Confirmation code (sometimes called a matching ID) – a unique identifier that tells that server which specific profile is yours.

When you scan a QR code, your phone reads both pieces at once and fills them in for you. When you activate manually, you're entering those same two pieces into separate fields yourself. That's why some manual-entry screens ask for "SM-DP+ Address" and "Confirmation Code" as two boxes rather than one — some providers hand you the values pre-split, while others give you a single combined code that already contains both.

Where Do You Find Your eSIM Activation Code?

Your activation code comes from wherever you bought the eSIM — not from your phone or your home carrier. In practice, check these places:

If you bought through Simnity, your activation details — the QR code and the manual SM-DP+ address and confirmation code — are available on your order confirmation and in your Simnity account, tied to the plan you purchased. Nothing needs to be requested separately; it's generated the moment your order goes through.

A few things worth checking as you look for it:

• Check spam or promotions folders. Activation emails sometimes get filtered, especially if you bought late at night before a flight.
• It's tied to one device. An activation code, like a QR code, is generally valid for a single installation. Once it's been used on one phone, the same code usually won't reactivate the profile on a second device.
• It can expire if unused. Some providers set a window for redeeming a profile after purchase. If your code isn't working weeks after you got it, expiry is one possible cause — check with support before assuming it's a data-entry mistake.

How to Enter an Activation Code Manually

Manual entry exists on both iOS and Android for situations where scanning isn't possible — a cracked screen, a QR image that won't focus, or a code sent as plain text with no image attached at all. At a high level:

1. Open your phone's cellular or mobile network settings and choose to add an eSIM.
2. Select the option to enter details manually instead of scanning.
3. Enter the SM-DP+ address exactly as given, with no extra spaces.
4. Enter the confirmation code, or paste the combined code if that's what you were given.
5. Confirm and let the phone download the profile — this can take anywhere from a few seconds to a couple of minutes depending on your connection.
6. Label the new line and set your data preferences.

Menu names differ slightly between iOS and Android versions, so for the precise field-by-field walkthrough, use the manual-activation guide linked above.

What If the Code Doesn't Work?

A few recurring issues account for most activation failures:

• Typos in a long code. SM-DP+ addresses and confirmation codes are long alphanumeric strings — copy-paste is far more reliable than typing them out by hand.
• No internet connection during setup. Your phone needs Wi-Fi or existing mobile data to reach the SM-DP+ server and download the profile; activation can't happen fully offline.
• The code has already been used. Since activation codes are typically single-use, reinstalling on a new phone usually means requesting a fresh code from your provider rather than reusing the old one.
• "Cellular plan can't be added" errors. This is a distinct, common error message with its own set of causes — see our dedicated troubleshooting post if you hit it.
• The QR code specifically won't scan. If you're still trying the QR route before switching to manual entry, our QR-scanning troubleshooting guide covers that separately.

If none of that resolves it, the fastest fix is contacting your eSIM provider's support with your order number — they can confirm whether the code is still valid or needs to be reissued.

FAQ

Is an eSIM activation code the same as a QR code? They carry the same information — an SM-DP+ server address and a confirmation code — just in different formats. The QR code is a scannable image of that data; the activation code is the same data given to you as text for manual entry.

Can I use my eSIM activation code on more than one phone? Generally no. Activation codes are typically tied to a single profile installation, so once it's used on one device, the same code usually won't work on another. You'd need a new eSIM and code from your provider for a second device.

Where does Simnity send the activation code? It's included in your order confirmation and available in your account after purchase, alongside the QR code for the same plan.

What if I lost my activation email? Check your provider's app (if they have one) or online account first — most eSIM providers, including Simnity, keep your install details accessible there even if the original email is gone.

Do I need Wi-Fi to enter the activation code? Yes, an internet connection — Wi-Fi or existing cellular data — is needed to download the eSIM profile from the SM-DP+ server, whether you scan a QR code or enter the details manually.

Simnity provides both the QR code and the manual SM-DP+ address and confirmation code for its travel eSIM plans, covering 190+ countries and regions, so you're covered either way when you land. Check available eSIM plans at Simnity before your next trip.