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Why your eSIM won't install: every reason and what to do (2026)

Mykyta DzhusMykyta Dzhus · Updated 2026-11-13 · 27 min read · eSIM & mobile data

You bought a travel eSIM, you scan the QR code, and your iPhone says “This code is no longer valid”. Or the eSIM seems to install, but after landing there's no internet. We've collected every known reason an eSIM won't install or won't work: a phone without eSIM, a carrier lock, a deleted profile, a VPN, a work phone, even Turkey's 120-day rule. For each one there's a way to check it in a minute and a clear next step. Error messages come from Apple's and Samsung's own help pages, and where those say nothing, from eSIM sellers' help pages and forums, which we mark. Everything was checked on 13 November 2026.

Why your eSIM won't install: every reason and what to do (2026)
In short
  • The most common cause: no stable internet while the eSIM downloads. Install it at home over Wi-Fi, not at the airport or on a ship.
  • Don't scan the QR code again until you've checked that the eSIM isn't already installed: a second scan often ends with “This code is no longer valid”.
  • Don't delete an eSIM “just in case”. Not every seller lets you restore it: Yesim allows up to 5 installs with the same QR on the same phone, Airalo doesn't.
  • No option to add an eSIM? The phone may be a version without eSIM (China, Hong Kong, Macao) or a work phone with company restrictions.
  • Installed but no internet: choose it for cellular data, turn on data roaming for it, toggle airplane mode and restart the phone.
Contents
  1. In short
  2. The 60-second check
  3. Table: reason, how to check, what to do
  4. Phone without eSIM, or a regional version without it
  5. Phones bought in the UK or the US
  6. The phone is carrier-locked (SIM lock)
  7. Blacklisted IMEI: theft, loss, unpaid instalments
  8. No internet while the eSIM downloads
  9. QR code already used or eSIM deleted: can you reinstall?
  10. Old iOS, carrier settings, VPN and work phones
  11. Too many eSIM profiles
  12. eSIM installed, but no internet
  13. Turkey: the 120-day IMEI rule
  14. Error messages: iPhone, Samsung, Pixel
  15. What to do if nothing helped
  16. Sources
  17. Tutu eSIM: how we help with installation

In short

  • Check the internet first. The eSIM profile downloads from a server, and Apple tells you to connect your iPhone to Wi-Fi. Weak Wi-Fi at an airport, on a ship or in a hotel with a sign-in page often breaks the download.
  • Does your phone have eSIM at all? iPhones have eSIM from the XS, XS Max and XR on, but versions for China mainland, Hong Kong and Macao often come with two physical SIM slots instead. With Samsung it depends on the country of sale and the model.
  • Carrier lock. A locked phone won't accept a travel eSIM. On iPhone you see it under About, the Carrier Lock line. Only the carrier can remove it.
  • Don't rescan the QR blindly. First check whether the eSIM already shows up in your list of lines. A used code gives an error.
  • A deleted profile can't always be restored. Yesim confirmed to us in writing on 13 November 2026: a deleted eSIM can be installed again with the same QR, up to five installations per eSIM, on the same phone. Airalo doesn't allow it. Every seller has its own rules.
  • VPN, work phone, old iOS. Turn off your VPN and filters while installing, update iOS. On a work iPhone, the company may block adding eSIMs.
  • Installed, but no internet. Usually data is going through another line, or data roaming is off on the eSIM. It's a one-minute fix, see below.

The 60-second check

Before reading on, run through this short list. It covers most of the cases people bring to us.

  1. Dial *#06# like a phone number. If there's an EID line (32 digits), your phone has eSIM. No EID: most likely no eSIM, and you can stop here.
  2. Check the internet. Open any website in the browser. If the Wi-Fi wants you to sign in on a page, or pages load slowly, switch to home Wi-Fi or a hotspot from another phone.
  3. Check the carrier lock. On iPhone: Settings → General → About, the Carrier Lock line. It must say “No SIM restrictions”.
  4. Look at your lines. Settings → Cellular (Mobile Data in the UK). If a new line is already there, the eSIM is installed and you don't need to scan again.
  5. Turn off your VPN and ad blockers while installing.
  6. Update iOS (General → Software Update) or Android to the latest available version.
  7. Count the eSIMs in the list. If there are many, delete old ones you definitely don't use. Leave the new travel eSIM alone.
  8. Error keeps coming back? Take a screenshot and write to the seller. Don't buy another eSIM until you know the cause.

The easiest way to check your model is our Compatible devices page: on Android it detects the model itself and tells you right away whether it has eSIM.

Does my phone support eSIM →

Table: reason, how to check, what to do

Every reason from this article in one table. Each is covered in detail, with sources, below.

ReasonHow to checkWhat to do
Phone without eSIM, or a regional version without itDial *#06#: if there's an EID line, the phone has eSIM. On iPhone, look for the add eSIM option under CellularUse another phone or a physical SIM. iPhones for China, Hong Kong and Macao and Samsungs from China, Hong Kong and Taiwan are often without eSIM
Carrier lockiPhone: Settings → General → About, the Carrier Lock line must say “No SIM restrictions”Only the carrier that sold the phone can unlock it. Apple can't
Blacklisted IMEI or unpaid instalmentsThe carrier's free IMEI check. Typical sign: the eSIM installs, there's no network, but Wi-Fi worksReturn the phone to the seller, get the block lifted through the previous owner or carrier. Another eSIM won't help
No internet while downloadingOpen any website in the browserStable home Wi-Fi or mobile data, not a public network with a sign-in page
QR code already used, eSIM already thereCellular: is there a new line? ICCID (20 digits starting with 89) in AboutDon't scan again. Ask the seller for a new QR
Profile deletedThe eSIM is gone from the list of linesDepends on the seller: Yesim allows up to 5 installs with the same QR on the same phone, Airalo doesn't
Old iOS or carrier settingsGeneral → Software Update; About → the version next to CarrierUpdate iOS and carrier settings
VPN, filters, private DNSIs a VPN or ad blocker on?Turn it off while installing
Work phone (MDM)General → VPN & Device Management: is there a company profile?Ask your IT team or put the eSIM on a personal phone
Too many profilesHow many eSIMs are in the listDelete old ones you don't need (iPhone stores eight or more, Samsung 2 to 10)
Installed, but no internetWhich line is used for data, is the line on, is data roaming on for itCellular Data → the travel eSIM; turn the line on; airplane mode on/off; restart
Turkey, stays over 120 daysturkiye.gov.tr/imei-sorgulamaNot an issue for a one- or two-week holiday; for long stays register the IMEI

The order isn't random: at the top are reasons the eSIM will never work on that phone, further down are one-minute fixes.

Phone without eSIM, or a regional version without it

The most annoying reason: the phone simply has no eSIM, even though the model looks “the same”.

iPhone. According to Apple, eSIM is on the iPhone XS, XS Max, XR and later. But the country the phone was made for matters as much as the model. Apple says that in China mainland only the iPhone 18 Pro, iPhone 18 Pro Max, iPhone Duo, iPhone 17e and iPhone Air support eSIM, and that certain models for Hong Kong and Macao have two nano-SIM slots. So older iPhones for China, Hong Kong and Macao with two physical SIMs don't support eSIM. These phones often turn up through grey imports.

The model number tells you for sure: Settings → General → About, tap the Model Number line. The numbers of the versions without eSIM, from Apple's page (for example A3092 for the iPhone 15), are on our Compatible devices page, where you can also type yours.

iPhone model numbers without eSIM (per Apple)
ModelNumber
iPhone 17 Pro MaxA3527
iPhone 17 ProA3524
iPhone 17A3521
iPhone 16eA3410
iPhone 16 Pro MaxA3297
iPhone 16 ProA3294
iPhone 16 PlusA3291
iPhone 16A3288
iPhone 15 Pro MaxA3108
iPhone 15 ProA3104
iPhone 15 PlusA3096
iPhone 15A3092
iPhone 14 Pro MaxA2896
iPhone 14 ProA2892
iPhone 14 PlusA2888
iPhone 14A2884
iPhone SE (2022)A2785
iPhone 13 Pro MaxA2644
iPhone 13 ProA2639
iPhone 13A2634
iPhone 13 miniA2629
iPhone 12 Pro MaxA2412
iPhone 12 ProA2408
iPhone 12A2404
iPhone 12 miniA2400
iPhone SE (2020)A2298
iPhone 11 Pro MaxA2220
iPhone 11 ProA2217
iPhone 11A2223
iPhone XS MaxA2104
iPhone XSA2100
iPhone XRA2108

support.apple.com

The opposite also happens. According to MacRumors and heise, the US iPhone 14 was the first to ship without a SIM tray (2022), the iPhone 17 and 17 Pro are eSIM-only in 12 countries (including the US, Canada, Japan, Mexico, the UAE and Saudi Arabia), and the iPhone Air is eSIM-only worldwide. That's no problem for a travel eSIM, it installs fine. But your home SIM can only go into such a phone as an eSIM.

Samsung. Samsung itself says about the Galaxy A55 and A35 that eSIM availability depends on your region, carrier and device model. On Samsung's forum a buyer said his A55 from Hong Kong arrived without eSIM, with two nano-SIM slots, and the A35 comes in both versions. The eSIM seller Roamless says Samsung phones sold in China, Hong Kong and Taiwan don't support eSIM; we didn't find such a list on Samsung's own site.

How to check. Dial *#06#: an EID line means the phone has eSIM. On iPhone, look for the option to add an eSIM under Settings → Cellular. If it's missing, the cause may be the model, a regional version or company restrictions (see below). A full model table is in our article “Does my phone support eSIM? Model list and a 10-second check”.

What to do. If there's no eSIM, no setting will add one. Options: install the eSIM on a travel companion's phone and share a hotspot, buy a local SIM card, or use a physical SIM.

Phones bought in the UK or the US

Where the phone was bought often decides whether it accepts a travel eSIM. Two markets work very differently.

United Kingdom: locked phones are banned. Ofcom decided in 2020 to ban the sale of locked phones; because of the pandemic the deadline was pushed back by 12 months, and the ban has applied since December 2021. According to MacRumors, it affected BT/EE, Tesco Mobile and Vodafone, which used to lock their phones. O2, Sky, Three and Virgin didn't lock phones. Unlocking used to cost about £10. So a phone bought new from a UK carrier after December 2021 should come unlocked, while an older BT/EE, Tesco Mobile or Vodafone phone may still be locked: ask the carrier to unlock it before you travel.

United States: no general unlocking rule. In 2024 the FCC proposed requiring all carriers to unlock phones 60 days after activation, but this general rule has not been adopted. According to Droid Life, in January 2026 the FCC released Verizon from its own 60-day rule (a condition of its spectrum licence); Verizon now follows the CTIA Consumer Code until a general rule exists. According to TechSpot, T-Mobile keeps prepaid phones locked for up to 365 days.

What this means for you:

  • US iPhones and Pixels from eBay or grey imports are often locked. Before you pay, ask the seller for a screenshot of Settings → General → About → Carrier Lock showing “No SIM restrictions”.
  • A US iPhone 14 or newer has no SIM tray. A travel eSIM installs on it as usual, but your home SIM must also be an eSIM. If your carrier only offers a physical SIM, that phone can't use it.
  • A UK phone from before December 2021 from BT/EE, Tesco Mobile or Vodafone: check Carrier Lock; if it's locked, the carrier can unlock it.
  • A used phone from elsewhere in Europe: in Poland, for example, carriers block the IMEI of phones bought on instalments if payments stop (see the blacklist section). Check the IMEI before you buy.

The phone is carrier-locked (SIM lock)

A phone bought on contract often accepts only that carrier's SIM. It has eSIM, it shows an EID, but it won't add anyone else's profile, travel eSIMs included.

How to check on iPhone. Settings → General → About, the Carrier Lock line. It must say “No SIM restrictions”. Apple itself suggests this check before a trip. According to eSIMDB, the line has been there since iOS 14, and iPhones bought directly from Apple are usually unlocked.

The error you'll see. According to eSIMDB, a locked iPhone shows “Cellular Plans from This Carrier Cannot Be Added”.

Android. We didn't find one official way to check. In practice, the simplest test is to insert a physical SIM from another carrier. If the phone rejects it or asks for an unlock code, it's locked.

What to do. Apple is clear: only the carrier can unlock an iPhone, Apple can't. Contact the carrier that sold the phone. According to eSIMDB, some carriers unlock only after a minimum contract period. If the phone was sold to you as “new and unlocked”, that's grounds to return it.

Blacklisted IMEI: theft, loss, unpaid instalments

The IMEI is the phone's own number. If it's been reported stolen or lost, carriers may refuse to let the phone onto their network.

How it works. The GSMA runs the Device Registry, a global database of IMEIs reported lost or stolen. Carriers block those phones on their networks and share the data with others. But not everyone takes part: a GSMA white paper from October 2024 says 130 of the roughly 800 operators worldwide participate. Mobile News reports that many carriers don't report thefts or don't block phones reported elsewhere. So a phone can work in one country and be blocked in another.

Will it stop the eSIM from installing? We found no direct source. A blacklist works at network level: the phone is checked when it registers on the network. So most likely the eSIM profile will download and install, but the phone will show “No Service” or SOS while Wi-Fi keeps working. BankMyCell confirms the last part: a blocked IMEI doesn't stop you using the internet over Wi-Fi. This is our conclusion, not an official rule.

A special case: EID blocking. According to a GSMA presentation, after eSIM fraud a carrier can block the phone's EID so no further eSIMs can be downloaded to it. Then no profile will download at all.

Unpaid instalments. In Poland the four big carriers (Plus, T-Mobile, Orange and Play) block the IMEI of phones bought on instalments if the payments stop, according to Spider's Web and Telepolis. This isn't a SIM lock but an IMEI block, and all four have a free IMEI check on their sites.

What to do. Check the IMEI (dial *#06#) with the free checker of a carrier in the country where the phone was bought. If it's blacklisted, only the person who reported it or the carrier can lift the block. Buying another eSIM won't change anything.

No internet while the eSIM downloads

This is the most common of the easy-to-fix causes. The QR code is only an address: the phone downloads the actual profile from a server. If the connection drops halfway, the installation doesn't finish.

What Apple says. Connect your iPhone to a Wi-Fi network or hotspot. Only models without a SIM tray in some countries can activate without Wi-Fi.

What Samsung says. If the network is unstable, try again later. If another eSIM can be added without problems, the issue is the network, and you should contact the carrier.

What Airalo says. One cause of the “Unable to Complete Cellular Plan Change” error is a slow or unstable connection, “usually because of Wi-Fi on a ship or in a public place”.

A real case. On 13 November 2026 one of our customers sent us a screenshot from an iPhone set to Russian: «Сбой активации eSIM. Повторите попытку или обратитесь к оператору за помощью.» (roughly: “eSIM activation failed. Try again or contact your carrier for help.”), with “Cancel” and “Retry” buttons. The cause was simple: the phone had no internet while downloading. We haven't seen the exact English wording of this message, so go by the meaning.

What to do.

  • Install the eSIM at home, over home Wi-Fi or your main SIM's mobile data.
  • Avoid Wi-Fi with a sign-in page (hotels, airports, cafés) and ship Wi-Fi. We found no source saying such networks block eSIM servers, but the connection there is often unstable, so better safe than sorry.
  • Don't close the installation screen or restart the phone until it finishes. Samsung explicitly says not to restart while adding an eSIM.
  • Before tapping retry, make sure the internet actually works: open any website.

QR code already used or eSIM deleted: can you reinstall?

Most eSIM QR codes are single-use: once the install succeeds, the code is spent. That leads to two common situations.

“This code is no longer valid”. According to eSIMDB, the full text is “eSIM Cannot Be Added. This code is no longer valid”, and on iOS 15 and older you may see “Cellular Plan Cannot Be Added” instead. The cause: the QR has already been used or has expired. If you interrupt the installation halfway, the code can also become invalid.

First check whether the eSIM is already installed. Sometimes the install goes through quietly, and then a second scan shows the error. Open Settings → Cellular and look for a new line. Airalo also suggests looking for the ICCID (20 digits starting with 89) under Settings → General → About. If the line is there, you don't need to scan anything: go to the data settings.

Samsung. Samsung's official help lists two similar errors: the QR code (or activation code) has expired, which needs a new code, and the eSIM is in use on another device, which means contacting the carrier. We read that page in Russian, so the English wording on your phone may differ.

And if the eSIM was deleted? It depends on the seller:

  • Yesim. Yesim's help says a deleted profile can be restored for free with the same QR if it's “rescanned using the same device on which you previously installed” it. Another phone needs a new QR. The help page didn't say how many times, so we asked. On 13 November 2026 Yesim support replied in writing: “a profile with the status Deleted can be installed again with the original QR code or link (up to five installations per eSIM)”.
  • Airalo. According to Airalo's help, a deleted eSIM can't be reinstalled.

What to do. Don't delete a travel eSIM even if it “doesn't work”: first go through the section on no internet after installing. If you've already deleted it, write to the seller before buying a new one: some can restore it, others will issue a new QR.

Old iOS, carrier settings, VPN and work phones

These causes are rarely obvious, but they're quick to fix.

iOS version. Apple recommends updating your iPhone to the latest available iOS (Settings → General → Software Update). Apple also suggests checking for a carrier settings update: Settings → General → About, then in the eSIM section tap the version number next to Carrier. If there's an update, the phone will offer to install it.

VPN. Holafly's help lists a VPN and a poor connection among the causes of “This code is no longer valid”. So turn the VPN off while installing; you can turn it back on afterwards.

iCloud Private Relay, Limit IP Address Tracking, DNS ad blockers, Screen Time. We found no official source saying they interfere with eSIM. But if the installation won't go through, turn them off for a few minutes: it costs nothing.

Date and time. For Pixel, eSIM sellers (Simology, for example) recommend turning on automatic date and time. It doesn't hurt on other phones either.

Work phones (MDM). If your employer issued the phone or it has a management profile, the administrator can block eSIM changes. Apple's deployment documentation has a restriction that stops the user adding and removing eSIMs, and a separate one that restricts changing cellular plan settings. According to a post on Apple's developer forums, the user then sees “eSIM modification not allowed”. Check Settings → General → VPN & Device Management: if there's a company profile, you most likely won't be able to add a travel eSIM. Ask your IT team or put the eSIM on a personal phone.

Too many eSIM profiles

A phone stores a limited number of eSIMs, and every trip adds one more.

iPhone. Apple says an iPhone can hold eight or more eSIMs. Usually two lines are active at once (Dual SIM), the rest sit in the list switched off. Airalo says “5 to 10” profiles, but we go with Apple's figure.

Samsung. According to Samsung's official help, a Galaxy stores 2 to 10 profiles depending on the model, and eSIMs from different carriers take up different amounts of memory. If you see a “memory full” error (on forums it appears in English as “eSIM storage is full”), Samsung suggests deleting one or two old eSIMs.

Pixel. According to eSIM sellers, a Pixel can store several profiles, but mobile data goes through one line only. We found no official figure from Google.

What to do. Delete eSIMs from past trips that you definitely won't use again: their plans have usually expired. Don't delete your home eSIM or a new travel eSIM you haven't used yet.

eSIM installed, but no internet

The most common scene after landing: two lines in the list, no internet. It's usually the settings, not the eSIM.

  1. Choose the line for data. Apple: Settings → Cellular → Cellular Data, then pick the travel eSIM.
  2. Turn on data roaming on the travel eSIM. For a travel eSIM every country counts as roaming, so without this switch there's no internet. It costs nothing extra: the price is already in the plan. On your home SIM, keep data roaming off.
  3. Make sure the line is on. Settings → Cellular → the travel eSIM → the switch that turns the line on. Airalo lists mobile data being off among the causes of errors.
  4. Turn airplane mode on and off. Apple suggests checking Control Center after each step to see whether the network name has appeared.
  5. Turn the line off and on again in Settings → Cellular.
  6. Restart the phone. This is the last step on Apple's list.

iOS 26: the travel eSIM prompt. According to Apple, from iOS 26, if you buy a travel eSIM in advance, the iPhone asks where you'll use it. After you land you may get a “Turn On Travel eSIM” notification with two options: “Travel eSIM Only” or “Travel eSIM and Current eSIM”. With the second option your home line stays on too and may run up roaming charges. So if you only need your home SIM for bank texts, make sure data roaming is off on it. When you're back home, check that your home eSIM is on again (“Turn On This Line” in its settings).

A few more things to check. Are you already in the country the plan is for? An eSIM for Turkey won't give you internet at home. Has the data or the validity run out? If the phone keeps searching for a network, try turning off automatic network selection and picking another local carrier. These are standard tips from eSIM sellers, but the specific settings (APN, network choice) depend on the plan, so if nothing helps, contact your seller's support.

To make sure nothing is forgotten before the flight, use our checklist.

✅ Before-you-fly checklist →

Turkey: the 120-day IMEI rule

This one affects using the network, not installing, and only on long stays.

According to Yesim and travel sites, in Turkey a phone whose IMEI isn't registered gets blocked on Turkish networks after 120 days, and the days add up across trips. Travel sites (Turkey Travel Planner, for example) speak of 120 days “via international roaming or with a Turkish SIM”. Whether the rule applies to travel eSIMs, Yesim itself says it doesn't know. Sites also disagree on how the days are counted: cumulatively or from the start of the year. We didn't check the official text of the Turkish regulator BTK.

How to check. The site turkiye.gov.tr/imei-sorgulama checks an IMEI's status. Dial *#06# to see yours. For an iPhone with eSIM, Yesim suggests using IMEI2.

Bottom line. For a holiday of a week or two it doesn't matter. If you spend months in Turkey or go often, sort out IMEI registration in advance.

Error messages: iPhone, Samsung, Pixel

Apple doesn't publish a list of eSIM errors: its “If you can't set up an eSIM” page only asks you to note the exact error text. So the messages below come from eSIMDB's and Airalo's help pages, Apple's forums and our customer's screenshot. The wording on your phone can differ slightly by iOS version and language, so search by meaning, not word for word.

What iPhone saysSourceMost likely causeWhat to do
“eSIM Cannot Be Added. This code is no longer valid” (iOS 15 and older: “Cellular Plan Cannot Be Added”)eSIMDBQR already used or expired, eSIM already installed, partial scan, VPN, weak connectionCheck whether the eSIM is already installed; ask the seller for a new QR
“Cellular Plans from This Carrier Cannot Be Added”eSIMDBthe phone is carrier-lockedCheck Carrier Lock, ask the carrier to unlock
“Unable to Complete Cellular Plan Change”Airalotoo many profiles, mobile data off, eSIM already installed, unstable networkDelete old eSIMs, check the connection and the list of lines
“Cellular plan can't be set up, eSIM installation is unsupported on your device”Apple foruma model or regional version without eSIM, carrier restrictionsCheck the model and Carrier Lock
“eSIM modification not allowed”Apple Developer Forumsa work phone with MDM restrictionsAsk your IT team
Russian: «Сбой активации eSIM. Повторите попытку или обратитесь к оператору за помощью.» (roughly: “eSIM activation failed. Try again or contact your carrier for help.”)a screenshot from our customer, 13.11.2026; we haven't found the exact English wordingin our case, no internet while downloadingConnect to stable Wi-Fi and tap retry
The “Add Cellular Plan” / “Add eSIM” option is missingApple forumsa model without eSIM, MDM, a regional versionCheck *#06#, the model and management profiles

Samsung Galaxy. Samsung has an official help page on these errors. We read it in Russian, so the English wording on your phone may differ; the meanings are:

  • Memory full: the phone stores too many eSIMs, delete one or two old ones.
  • In use on another device: contact the carrier that issued the eSIM.
  • The QR code (or activation code) has expired: you need a new code.
  • Network errors: try again later on a stable connection.
  • EID missing: you can find it in the phone's status information under About phone.

Samsung also says not to restart the phone while adding an eSIM and points to resetting network settings under General management → Reset.

Google Pixel. We found no official error texts (Google's help page didn't open when we checked). According to eSIM sellers, “Contact your carrier” can appear during setup, and you add an eSIM under Settings → Network & internet → SIMs → Add SIM or Download a SIM. Android Authority reported a known eSIM bug on the Pixel 9 and 10 that was still unfixed as of May 2026. If you have a Pixel 9 or 10 and nothing helps, update the system and contact the seller.

What to do if nothing helped

If you've gone through every step and the eSIM still won't install or work, don't buy a new one at random: a second one may fail for the same reason.

  1. Take a screenshot of the error. The error text points to the cause fastest. Apple also asks you to note it exactly.
  2. Have your order number ready and the e-mail address the QR code was sent to.
  3. Give the phone model and iOS or Android version, and where the phone was bought (new, used, abroad).
  4. Say what you've already tried: was there Wi-Fi, did you scan the QR again, did you delete the eSIM.
  5. Write to the eSIM seller. They can see the profile's status on their side: whether it downloaded, whether it was deleted, whether it can be restored.

If you bought the eSIM from us, message our support on Telegram: @TutuEsimSupportBot. We answer every day.

If the problem is the phone itself (carrier lock, blacklist, a model without eSIM), only the phone's seller or the carrier that blocked it can help. To stay connected on the trip, get a local SIM, use a travel companion's hotspot or fall back on roaming for a while.

Sources

All sources were checked on 13 November 2026. We state official Apple, Samsung, GSMA, Ofcom and FCC pages as fact; eSIM sellers' help pages (Airalo, Holafly, eSIMDB, Roamless, Simology), media and forums are marked in the text with “according to” or “on a forum”. Two sources are our own: Yesim support's written answer and a customer's error screenshot. Where a page has a publication date, it's in brackets.

Tutu eSIM: how we help with installation

Tutu eSIM is a Ukrainian travel eSIM service with mobile data for 197 countries and regions. We try to head off most of the problems in this article before you even pay:

  • Phone check before you buy. On “Compatible devices” you can check your model, and on Android the page detects it for you. If it looks like your phone has no eSIM, the site warns you before purchase.
  • One-tap install. On an iPhone with iOS 17.4 or later, the eSIM installs with a button in Safari, no QR scanning. For other phones the e-mail has a QR code and the installation guide.
  • Support every day on Telegram @TutuEsimSupportBot, in the chat on the site and at support@tutuesim.com.
  • Refunds. Until the eSIM is installed, you get a full refund within 30 days of purchase. If the eSIM won't install, don't buy it again: contact support, we'll help or refund you.

FAQ

Why does my iPhone say “This code is no longer valid”?

Most often the QR code has already been used: the eSIM installed earlier or the install was interrupted. Check Settings → Cellular: if the new line is there, you don't need to scan. If not, ask the seller for a new QR. According to Holafly, a VPN or a weak connection can also cause it.

What does “eSIM activation failed” mean?

On an iPhone set to Russian our customer saw «Сбой активации eSIM. Повторите попытку или обратитесь к оператору за помощью.» (roughly: “eSIM activation failed. Try again or contact your carrier.”) on 13.11.2026. The cause was no internet during the download. Connect to stable Wi-Fi and tap retry.

Can I reinstall an eSIM I deleted?

It depends on the seller. Yesim allows up to five installations per eSIM with the same QR on the same phone (written answer from their support, 13.11.2026). Airalo doesn't allow a deleted eSIM to be reinstalled. Write to the seller before buying a new one.

Can I install an eSIM without Wi-Fi?

You need some stable internet connection: Wi-Fi or another SIM's mobile data. Apple recommends Wi-Fi or a hotspot. Avoid public Wi-Fi with a sign-in page and ship Wi-Fi.

How do I know if my iPhone is carrier-locked?

Settings → General → About, the Carrier Lock line. It must say “No SIM restrictions”. If it shows a carrier's name or anything else, the phone is locked, and only the carrier can unlock it.

My eSIM installed but there's no internet. What now?

Choose the travel eSIM under Cellular Data, turn on data roaming for it, check the line is on, toggle airplane mode and restart the phone. Keep data roaming off on your home SIM.

Are phones still sold locked in the UK?

No. Ofcom has banned the sale of locked phones since December 2021. Before that BT/EE, Tesco Mobile and Vodafone locked their phones, so an older phone from them may still need unlocking by the carrier.

Do US carriers have to unlock phones after 60 days?

Not as a general rule. The FCC proposed it in 2024, but it hasn't been adopted. In January 2026 Verizon was released from its own 60-day rule and now follows the CTIA Consumer Code; T-Mobile keeps prepaid phones locked for up to 365 days.

Mykyta Dzhus
Mykyta DzhusProgrammer and traveller from Kyiv

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