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Japan eSIM QR Code Lost or Already Used? Reinstall Rules

Your Japan eSIM QR code is usually single-use. What the “already used” error means, which providers allow reinstalls, and how to recover fast.

By Japan Travel Dobbo Editorial10 min read
On this page
  1. Why does a Japan eSIM QR code only work once?
  2. What does “this code is no longer valid” mean?
  3. Can you reinstall an eSIM you deleted?
  4. Scenario table: what happens and what to do
  5. How do you reinstall an eSIM on iPhone?
  6. How do you reinstall an eSIM on Android?
  7. Moving a Japan travel eSIM to a new phone
  8. What to do if you are already in Japan with no data
  9. How to back up your activation details before you fly
  10. Frequently asked questions
  11. The short version
  12. Sources

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Short answer: most Japan travel eSIM QR codes are single-use, so once a profile has been installed the same code usually will not install again. Whether you can recover it depends entirely on your provider — some allow a limited number of reinstalls through their app, others treat a deleted profile as gone for good. If you have deleted the eSIM, changed phones, or lost the code, your first step is your provider’s account or app, not the QR image in your email.

This article explains what the “already used” and “no longer valid” errors really mean, which recovery paths exist, and what to do if you are already standing in a Japanese airport with no data. Policies below are as documented by each company as of September 2026.

Why does a Japan eSIM QR code only work once?

A QR code is not the eSIM itself. It is a pointer: it contains a server address and an activation token that your phone uses to download one specific profile over the internet.

Once that download completes, the profile has been issued and the token is normally spent. That is why re-scanning the same image later tends to fail rather than producing a second copy.

Airalo’s help centre puts the general position bluntly: “eSIMs typically can’t be reinstalled,” because unlike a plastic SIM they are tied to the device they were installed on and “cannot be easily transferred or reinstalled.” Providers differ on this, which is covered below.

The practical consequence is worth absorbing before your trip: the QR code in your inbox is not a backup. It is a one-shot delivery mechanism, and treating it as a spare copy is how people end up offline on arrival.

What does “this code is no longer valid” mean?

This is the most common failure message, and it does not always mean what people assume. Airalo’s troubleshooting page lists two causes for it: you are “trying to add an eSIM that has been added before,” or “the QR-code was partially scanned due to poor connection.”

For a genuinely first-time installation, the same page attributes the error to “a poor connection, VPN enabled, or too many eSIMs installed on the device.” That last one surprises people — phones store a limited number of eSIM profiles, and a device carrying several old travel eSIMs can simply refuse a new one.

Airalo’s recommended sequence for a first install is: disable any VPN, get a stable internet connection, remove eSIMs you will no longer use, update your phone’s software, and try a different installation method than the one that failed.

So before you conclude your code is burnt, rule out the boring causes. A half-scanned code on hotel WiFi looks identical to a used-up code from the error message alone.

Can you reinstall an eSIM you deleted?

Sometimes — and this is where providers genuinely disagree with each other, so check your own provider’s policy rather than a general rule.

Airalo states that if the eSIM has been removed and you attempt to reinstall it, “it will not be possible,” though its app may offer a recovery option that checks whether reinstallation is available for your specific plan. Its stated advice is to temporarily disable an eSIM you are not using rather than delete it.

Ubigi takes the opposite approach. Its help centre documents a reinstall path in the app (Settings, then “Re-install my Ubigi eSIM”) and states that “the re-installation of a Ubigi eSIM profile is limited to 5 times max after deletion.”

Apple’s own guidance is device-level rather than provider-level, and it is unambiguous: “If you erase an eSIM, you’ll need to contact your carrier to get a new one.” Apple also advises against deleting an eSIM as a troubleshooting step unless your carrier tells you to.

Read that last line twice. Deleting the profile is the single most common self-inflicted way travellers turn a fixable connection problem into an unfixable one.

Scenario table: what happens and what to do

Situation Is the original QR code still usable? What to try first Is your data allowance lost?
Bought the eSIM but never scanned the code Yes, on any compatible device Install normally; Ubigi, for example, gives a six-month window from purchase to activate No
Lost the email containing the QR code Usually yes, if you can retrieve it Log in to the provider’s app or web account, where the code and manual details are normally stored No
Deleted the profile from your phone Usually no Provider’s app reinstall function; Ubigi allows up to 5, Airalo says generally not possible Depends on provider policy — ask support before rebuying
Factory reset the same phone Usually no Same as deletion: provider app first, then support Depends on provider policy
Replaced your phone, old one still working Usually no Delete the profile on the old device first if your provider requires it, then reinstall from the app on the new one Often preserved if the provider supports reinstall
Phone lost, stolen or broken No Contact provider support directly — you cannot perform the delete step yourself Case by case; support decides

The pattern across every row is the same: the recovery lives in your provider account, not in the QR image.

How do you reinstall an eSIM on iPhone?

Apple documents several ways to add an eSIM, and knowing which one applies saves time when a QR code refuses to scan.

The QR code route is Settings, then Cellular, then Add Cellular Plan, and scanning the code. The manual route — the one to use when your provider has given you an SM-DP+ address and activation code instead of an image — is Settings, then Cellular (or Mobile Data), then Add Cellular Plan, then Enter Details Manually.

Apple also lists eSIM Quick Transfer, which moves a plan from a nearby iPhone via Settings, Cellular, Setup Cellular or Add eSIM, then Transfer From Nearby iPhone. Apple’s requirements include both devices signed in to your Apple Account, Bluetooth enabled, the previous iPhone unlocked, and a current iOS version (Apple’s page states iOS 18.4 or later for this flow).

One important caveat: Quick Transfer is designed around carrier-issued plans and depends on carrier support on the network side. Do not assume a travel eSIM will move this way — check your provider’s documentation before you wipe or trade in the old phone.

To delete a profile on iPhone, Apple’s steps are Settings, then Cellular, then Delete eSIM for a single plan, or tap the specific plan and choose Delete Plan when you have several.

How do you reinstall an eSIM on Android?

On Pixel and similar Android builds, Google documents adding an eSIM at Settings, then Network & internet, then SIMs, then Add SIM, then Set up an eSIM, following the on-screen instructions. If your SIM is not detected during initial setup, Google notes you may need to activate the eSIM with your carrier first.

For moving a plan between phones, Google’s path is Settings, then Network & internet, then SIMs, then Add SIM, then Transfer SIM from another device. Both devices need Android 12 or later, a current version of Google Play services, and a screen lock set up.

Google also notes that transfer behaviour depends on your carrier and may happen automatically during onboarding — and that if automatic transfer does not work, you will need to contact your carrier to activate the eSIM.

As on iPhone, this carrier-transfer machinery is built for network operator plans. Travel eSIM providers generally handle device changes through their own apps instead, which is why Ubigi’s documented flow runs through the Ubigi app rather than Android’s transfer screen.

Moving a Japan travel eSIM to a new phone

If your provider supports reinstalling, order of operations matters. Ubigi is explicit that “your Ubigi eSIM profile must be deleted on the first device before the re-installation on another device, otherwise the re-installation and swap will not work.”

If the first device is gone — broken, lost or already traded in — you cannot complete that deletion yourself, and Ubigi directs those users to contact customer service for help. Other providers structure this similarly, so expect a support ticket rather than a self-service button.

The takeaway for anyone upgrading a phone mid-trip: do the eSIM housekeeping before the old handset leaves your hands.

What to do if you are already in Japan with no data

If your code is dead and support cannot reissue quickly, you need an offline-friendly plan for the next few hours.

Find WiFi first. Airport terminals, most convenience stores, many stations and a large share of cafés carry free networks, and you only need enough connectivity to open your provider’s app or buy a replacement eSIM.

Buying on arrival is also realistic. Narita International Airport’s official service listing shows SIM card sales, eSIM and WiFi rental counters across Terminals 1, 2 and 3 from operators including JAL ABC, J WiFi & Mobile, XCom Global, Telecomsquare, SoftBank Global Rental, AnyFone JAPAN and Rakuten Mobile, plus SIM vending machines. Typical listed hours run around 07:00 to 21:00, with JAL ABC counters opening from 06:30.

One detail that catches late arrivals: Narita states that “mobile phone and Wi-Fi rental counters as well as SIM-card sales counters can only be found in areas before departure passport control.” Sort your connectivity in the arrivals area rather than assuming you can double back later.

How to back up your activation details before you fly

Nearly every one of the failures above is cheaper to prevent than to fix. Five minutes before departure covers most of it.

Save the manual installation details, not just the QR image — the SM-DP+ address and the activation code as text. If a camera cannot read a code on a dim screen, manual entry still works.

Install the provider’s app and confirm you can log in, since that account is where reinstall functions and reissued codes live. Note which email address you used, and keep your order or reference number somewhere you can reach offline.

Finally, install the eSIM before you leave home while you still have reliable WiFi, but do not switch it on until you land. Installation and activation are separate steps for most travel plans, and doing the fragile part at home removes the airport-WiFi variable entirely.

Frequently asked questions

Can I scan the same eSIM QR code on two phones?
Generally no. The code delivers one profile, and once it has been downloaded the activation token is normally spent, which is why the second attempt returns an “already used” or “no longer valid” error.

Does deleting an eSIM in Japan cancel my remaining data?
Not necessarily, but it can strand it. Whether the balance survives depends on your provider’s reinstall policy — Ubigi documents up to five reinstalls after deletion, while Airalo says a removed eSIM generally cannot be reinstalled. Contact support before buying a replacement.

My QR code will not scan at all. Is it broken?
Often not. Airalo lists poor connection, an active VPN, a partially scanned code and too many eSIMs already stored on the device as causes. Disable the VPN, get on stable WiFi, remove old unused profiles, update your software and try manual entry with the SM-DP+ address instead.

I bought an eSIM but have not scanned it yet and my phone died. Is the money gone?
Probably not. An unscanned code has not been redeemed. Ubigi, for instance, states that if you lose your phone before scanning, “you can still complete the installation later with your new/another eSIM compatible device,” and that its codes must be activated within six months of purchase. Check your own provider’s validity window.

Will Apple’s eSIM Quick Transfer move my Japan travel eSIM to a new iPhone?
Do not count on it. Quick Transfer depends on carrier support on the network side and is built around carrier-issued plans; travel eSIM providers typically handle device changes through their own app instead. Check your provider’s documentation before wiping the old phone.

The short version

Treat the QR code as disposable and your provider account as the real asset. Save the manual SM-DP+ details, install before you fly, avoid deleting a working profile as a troubleshooting reflex, and if something does go wrong, go to your provider’s app first — and to an airport counter or free WiFi second.

Sources

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