If your eSIM QR code won't scan, the fix is almost always one of five things: a dim or dirty screen, the wrong camera flow, poor lighting or distance, no Wi-Fi, or a QR that has already been used - and a clean, correctly delivered eSIM from £2.59 lets you skip the guesswork. Work through the steps below in order and you will connect in a couple of minutes. eSIMpass sells eSIMs for 200+ destinations; the US plan is used here purely as a worked example, but every step applies to any eSIM you install.
The single most common mistake is scanning with the regular Camera app instead of the dedicated Add-eSIM screen inside Settings. Fix that one thing and most "won't scan" problems disappear. Here is the full checklist.
First, Rule Out the Simple Causes
Before touching any settings, run these quick checks. They resolve the majority of failed scans:
- Brighten the screen showing the QR code. Turn the source device's brightness to maximum and turn off auto-dimming and Night Shift / blue-light filters. A phone camera struggles to lock onto a dim QR.
- Clean both screens. Wipe the screen displaying the QR and the camera lens of the phone doing the scanning. A smudge or fingerprint over the lens blurs the code just enough to fail.
- Kill the glare. Tilt the device so ceiling lights or windows are not reflecting off the QR. Reflections wash out the black-and-white pattern the camera needs.
- Get the distance right. Hold the phone roughly 15 to 25 cm (6 to 10 inches) from the QR, then move slowly closer and farther until it focuses. Too close and the camera cannot focus; too far and the squares blur together.
- Try a printed copy or a second screen. If you are scanning from the same phone's email, that obviously will not work. Open the QR on a laptop or a friend's phone, or print it. Printing on plain paper often scans more reliably than any screen.
If it still will not scan, the problem is usually the flow you are using, not the code itself.
Use the Add-eSIM Camera Flow, Not the Camera App
This is the fix that catches most people. Your phone's normal Camera app is not built to install an eSIM. You have to open the camera from inside the mobile settings so the phone knows it is reading an eSIM profile.
On iPhone (iOS):
- Open Settings > Mobile Service (called Mobile Data in some regions).
- Tap Add eSIM (older iOS: Add Mobile Plan).
- Choose Use QR Code.
- The camera opens inside this flow. Point it at the QR and hold steady.
- Follow the prompts to add the plan and give the line a label like "Travel" or "Data".
On Android:
- Samsung Galaxy: Settings > Connections > SIM manager > Add eSIM > Scan QR code (some models show Add mobile plan).
- Google Pixel: Settings > Network & internet > SIMs, tap the + or Download a SIM instead, then Next to open the scanner.
Menu wording varies slightly by brand and Android version, but the principle is identical: always start the scanner from the SIM or mobile settings, never from the standalone Camera app. If you want the full walkthrough with screenshots for both platforms, see our eSIM installation and activation guide, plus the device-specific steps for iPhone and Android.
Make Sure You Are on Stable Wi-Fi
Installing an eSIM downloads the profile over the internet, so the scan can appear to fail when it is really the download that stalled. A few points travellers miss:
- You need Wi-Fi or another working data connection to install. If this is your first eSIM and your phone has no other signal, connect to hotel, cafe, or home Wi-Fi first.
- Installing the eSIM does not use your plan's data. The download runs over Wi-Fi and does not touch the travel data you paid for, so there is no cost to installing early.
- Avoid captive-portal Wi-Fi (networks that make you click "I agree" on a login page). These sometimes block the activation server. If a hotel network is flaky, switch to a personal hotspot from another phone and try again.
Because the download does not consume your plan, the best practice is to install at home before you travel, then simply switch the line on when you land. Our what is an eSIM primer explains why this pre-arrival setup is one of the biggest advantages over a physical SIM.
Enter the eSIM Details Manually Instead
If the camera simply will not cooperate, you do not need the QR at all. Every eSIM QR encodes the same two pieces of text, and you can type them in by hand. Your confirmation email lists them, usually labelled SM-DP+ Address and Activation Code (sometimes shown as a single LPA:1$... string).
On iPhone: Settings > Mobile Service > Add eSIM > Use QR Code > Enter Details Manually, then paste the SM-DP+ address and activation code into their fields.
On Android (Samsung / Pixel): on the QR scan screen, look for Enter code manually or Need help?, then enter the same two values.
If your email gives you one long string starting with LPA:1$, that is the whole code. The part between the first two $ signs is the SM-DP+ address, and what follows is the activation code. Copy carefully; a single wrong character will make it fail. Manual entry is completely equivalent to scanning, so a plan bought from an honest provider installs exactly the same way either method.
An Already-Used QR Code Cannot Be Scanned Again
Here is a crucial detail almost no one explains: an eSIM profile can normally be installed only once. After you successfully add it, that same QR is spent. Re-scanning it later - for example after you delete the eSIM, or try to move it to a new phone - will usually fail, and that failure looks exactly like a "won't scan" error.
So if the QR worked once and now refuses, you are not doing anything wrong; the profile has already been claimed. You cannot re-use it. What you need is a fresh profile, which is why the next section matters.
Related to this: deleting an eSIM can be permanent. If you remove the profile from your phone, you may not be able to reinstall it from the old QR. Never delete a working eSIM to "start fresh" unless support has confirmed you will get a replacement.
When to Ask Support to Reissue the eSIM
Contact the provider for a new QR when any of these is true:
- The QR worked once and now will not scan (the profile is already used).
- Your phone shows an error like "Unable to Add Mobile Plan" or "This code is no longer valid."
- You deleted the eSIM and need it back.
- You have tried manual entry with the exact SM-DP+ address and activation code and it still fails.
A reputable seller can invalidate the old profile and issue a fresh one at no charge. When you write in, include your order number and the phone model so support can move fast. With eSIMpass, a replacement QR is issued to the same email, and you install it using the identical steps above.
Confirm Your Phone Actually Supports eSIM
If nothing installs at all, verify the hardware before blaming the code. Dial *#06# on the keypad: if an EID number appears alongside the IMEI, your phone has an eSIM chip. As a rule, eSIM is supported on iPhone XR / XS and newer, Samsung Galaxy S20 and newer, and Google Pixel 3 and newer.
Two more requirements catch people out:
- The phone must be network-unlocked. A handset locked to a home network will refuse a third-party eSIM.
- Some regional model variants (a few China and Hong Kong iPhones, for instance) ship without eSIM hardware.
Check the full list on our eSIM compatible devices page before you buy.
Example: A Clean US eSIM to Test the Flow On
To see the process end to end, here is what a real eSIMpass plan looks like. The US plan is a good example because it covers a huge, well-connected market:
| Data | Duration | Price |
|---|---|---|
| 3GB Data | 15 Days | £3.60 |
| 5GB Data | 30 Days | £5.39 |
| 10GB Data | 30 Days | £9.71 |
| 20GB Data | 30 Days | £17.47 |
| 50GB Data | 30 Days | £39.32 |
| 1 Day | 1 Day | £2.59 |
| 2 Days | 2 Days | £5.19 |
| 3 Days | 3 Days | £7.78 |
| 4 Days | 4 Days | £10.20 |
| 5 Days | 5 Days | £12.93 |
| 6 Days | 6 Days | £15.67 |
| 7 Days | 7 Days | £18.41 |
| 8 Days | 8 Days | £19.78 |
| 9 Days | 9 Days | £21.83 |
| 10 Days | 10 Days | £23.20 |
| 11 Days | 11 Days | £25.25 |
| 12 Days | 12 Days | £27.30 |
| 13 Days | 13 Days | £28.67 |
| 14 Days | 14 Days | £30.04 |
| 15 Days | 15 Days | £32.09 |
| 16 Days | 16 Days | £33.46 |
| 17 Days | 17 Days | £34.15 |
| 18 Days | 18 Days | £35.51 |
| 19 Days | 19 Days | £37.57 |
| 20 Days | 20 Days | £38.94 |
| 21 Days | 21 Days | £40.30 |
| 22 Days | 22 Days | £40.99 |
| 23 Days | 23 Days | £41.67 |
| 24 Days | 24 Days | £42.36 |
| 25 Days | 25 Days | £43.04 |
| 26 Days | 26 Days | £43.73 |
| 27 Days | 27 Days | £44.41 |
| 28 Days | 28 Days | £45.09 |
| 29 Days | 29 Days | £45.78 |
| 30 Days | 30 Days | £47.15 |
You buy, receive the QR by email within minutes, and run the exact Add-eSIM steps above. Not sure how much data to load? Estimate it here:
An eSIM connects to a major local host network in your destination. It is data-only, so there is no phone number attached, and it does not magically hop between several networks to find the strongest signal - it uses one solid host network. That is normal and is what keeps it cheap and reliable compared with paying roaming charges.
If the eSIM Installs but Still Fails Later
Sometimes the QR scans fine and the profile installs, but a different problem appears afterward - the line shows "No Service," or it connects with no internet. Those are separate issues from scanning, and they have their own fixes. If that is you, jump to our companion guides on why an eSIM won't install and getting online once it is installed. A QR that scans is only step one; turning on the line, enabling data roaming for the travel line, and selecting it as your data line come next.
Frequently Asked Questions
Why does my eSIM QR code fail to scan on my iPhone?
Almost always because you are using the standalone Camera app or a dim screen. Go to Settings > Mobile Service > Add eSIM > Use QR Code so the camera opens inside the eSIM flow, brighten the QR to full, clean the lens, and hold the phone 15 to 25 cm away. If it still fails, choose Enter Details Manually and type the SM-DP+ address and activation code from your email.
Can I install an eSIM without scanning the QR at all?
Yes. Every QR just encodes an SM-DP+ address and an activation code, both printed in your confirmation email. Use the Enter Details Manually option on iPhone or Enter code manually on Samsung and Pixel, then type those two values. It installs exactly the same eSIM.
Does scanning the QR use my eSIM's data?
No. The profile downloads over Wi-Fi or your existing connection and does not touch your travel data allowance. That is why you can safely install at home before your trip and just switch the line on when you arrive.
My QR worked once but won't scan again. What happened?
An eSIM profile is normally single-use. Once it installs successfully, the QR is spent and re-scanning it will fail. If you deleted the eSIM or switched phones, you need a fresh profile - contact support with your order number and they can reissue one.
Do I need Wi-Fi to scan and install my eSIM?
You need some internet connection to download the profile, and Wi-Fi is the easiest. Avoid login-page ("captive portal") networks, which can block activation. Installing uses no eSIM data, so there is no reason not to do it on home or hotel Wi-Fi before you travel.
How do I know my phone can use an eSIM before I buy?
Dial *#06#; if an EID number shows up, your phone supports eSIM. Generally that means iPhone XR/XS or newer, Galaxy S20 or newer, and Pixel 3 or newer, and the phone must be network-unlocked. See our eSIM compatible devices list to be sure.
Want an eSIM that installs first time?
Join 10,000+ travellers who chose eSIMpass. Clean QR delivery by email in minutes, with manual-entry codes included and free reissue if you ever need one.
Get Your eSIM
