You have landed at Istanbul or Antalya, the eSIM is installed, and there is nothing. No data, or a bar that keeps dropping back to No Service. It usually happens in the arrivals hall, at the exact moment you want a taxi and a map.
Almost all of these are settings on your phone rather than a broken eSIM. One of them is specific to Turkey and catches people who have used travel eSIMs elsewhere without trouble, so it is worth reading past the obvious steps even if you think you know this.
Settings and prices in this guide were checked by hand in September 2026. Providers change plans and network partners often, so confirm on your provider's page before you buy.
1. Data roaming is switched off
Does a Turkey eSIM need data roaming turned on?
Yes, and this causes more dead eSIMs than everything else combined. A travel eSIM is a visiting line. It reaches you by roaming onto a Turkish network, so with roaming off for that line you get nothing at all.
Most travellers switch it off on purpose, because they have been told for years to disable roaming before flying. That advice is about your home SIM. For the travel line it is exactly backwards.
On iPhone: Settings, then Mobile Data, tap the travel line, then turn Data Roaming on.
On Android: Settings, then Network and internet, then SIMs, tap the travel line, then Roaming. On Samsung it is Settings, then Connections, then Mobile networks, then Data roaming.
Leave roaming off on your home SIM. That is the line that bills you.
2. The phone is still sending data through your home SIM
Why does my Turkey eSIM show connected but nothing loads?
Because the line has registered and is sitting there unused. Two lines can both be switched on while only one of them carries mobile data. If that is still your home SIM with roaming off, nothing loads even though everything looks healthy.
On iPhone, Settings, then Mobile Data, and under the Mobile Data heading at the very top choose the travel line. On Android, open SIM manager or Dual SIM and set mobile data to the travel line.
While you are there, turn off the setting that lets the phone move data between lines on its own. On iPhone it is Allow Mobile Data Switching. It sounds helpful and it is how people come home to a roaming bill from their own carrier.
3. The APN is wrong or missing
Does a Turkey eSIM need an APN setting?
This one catches experienced travellers in particular.
An access point name tells the phone where to send data once it has joined a network. Without the right one you can register perfectly, show full bars, and carry nothing at all.
Access point names are set per plan, so a value that worked on your last trip will not necessarily work here, and people who have used a travel eSIM before tend to copy the old one across from memory. If you bought one of our Turkey plans and the phone has not filled it in, message support and we will send the exact setting.
No username, no password, nothing else in the other fields. People fill those in because the form shows them, and that alone will stop the data session.
iPhones usually take this from the profile. Samsung and other Android handsets often do not, so this is the step to check if you are on Android and everything else looks correct.
On Android: Settings, then Connections, then Mobile networks, then Access Point Names. Select the travel line at the top of that screen first, or you will edit your home carrier by mistake. Tap Add, put your provider's name in the Name field and the access point name in the APN field, save, then select it.
On iPhone: Settings, then Mobile Data, tap the line, then Mobile Data Network. If that row is missing, your carrier has locked it, which is normal and means it is already set.
Bought from someone else? Their access point name will be different again. Airalo, Holafly, Saily and Nomad each publish their own, and one provider's setting will never work on another's line.
4. The plan has not started yet
When does a Turkey eSIM plan actually begin?
Installing is not starting. On our plans, and on most travel eSIMs, the clock begins the first time the line connects to a network inside Turkey, not when you scan the code at home. That is deliberate, so you can set it up on your own wifi days before you fly without losing any of it.
The side effect is that a plan which has never connected shows zero usage and looks dead. It is not dead, it is waiting. If your provider's app reports the full allowance with no start date while the phone says No Service, the fault is in the connection, and steps 1 and 2 are where it lives.
5. The phone has picked a network your plan cannot use
Which network does a Turkey eSIM use?
Turkey has three networks: Turkcell, Vodafone Turkey and Türk Telekom. Travel eSIMs do not reach all of them. Each provider signs with one or two, and your phone can only join the ones your profile is allowed on.
Our Turkey plans run on Vodafone Turkey, with 5G where it has been built. Turkcell is the largest operator in the country by subscribers, so in a crowded place your phone may see it as the strongest signal and try to sit there. It will be refused, and that refusal looks exactly like no coverage.
Set network selection to Automatic first. On iPhone, Settings, then Mobile Data, tap the line, then Network Selection, and turn Automatic on. On Android it is under Mobile networks, then Network operators.
If it keeps failing, select Vodafone by hand, wait a minute, then put it back to Automatic once it has registered.
There is one more Turkish quirk. Close to the Greek islands, and near the eastern and southern land borders, phones sometimes latch onto a network in the neighbouring country. Your Turkey plan will not work on it, and depending on your home carrier it can also cost you. If the operator name on screen is not a Turkish one, select Vodafone manually.
6. The QR code will not install before you fly
Why will my Turkey eSIM not install?
Four causes cover nearly all of it.
The handset is carrier locked. A phone bought on contract will scan the code happily and then refuse to finish. Check with your carrier before you travel rather than at the gate.
The code has already been used. An eSIM profile installs once. If you scanned it, deleted the line and tried again, you need a fresh profile, not the same code.
You are on mobile data rather than wifi. The download needs a working connection, which is awkward when the eSIM you are installing is meant to be that connection.
The phone is too old. eSIM support starts somewhere around 2018 to 2019 depending on the model, and some regional versions of otherwise supported phones have no eSIM hardware at all.
7. It worked in Istanbul, then died on the road
Where does mobile data drop out in Turkey?
Turkey is better covered than most countries its size, and the honest answer is that you will have signal almost everywhere you are likely to go. Istanbul, Izmir, Ankara, Antalya, Cappadocia and the whole Aegean and Mediterranean coast are well served, including on the Bosphorus ferries.
The gaps are specific rather than general. The Kaçkar mountains in the northeast go quiet once you leave the valley roads. Long sections of the Lycian Way between Fethiye and Antalya have nothing, which surprises people because the beach they started from had 5G. Mount Nemrut, the road east towards Ani, and the middle of a gulet cruise are all patchy. Underground in Cappadocia, meaning Derinkuyu and Kaymaklı, there is no signal at all, which is not a fault.
Plan around it rather than against it. Save offline maps before a hiking day, and expect a balloon flight at dawn over Göreme to have perfectly good signal while the valley walk that afternoon does not.
8. It connects, but everything crawls
Why is my Turkey eSIM so slow?
Three reasons, and only one of them is a fault.
You are on an unlimited daily plan and have spent the full speed allowance for the day. Unlimited on almost every provider means a set amount at full speed each day, then a slower speed until midnight resets it. Ours drops to 1Mbps, which still carries maps and messages but not video.
The phone is clinging to a weak 5G signal rather than dropping to solid 4G. Setting the line to 4G or LTE instead of 5G Auto often settles it, especially in older parts of Istanbul where the walls are thick.
Or the network is simply busy. Antalya in August is a different place from Antalya in March, and every network there slows down when the population multiplies.
Before blaming the plan, look at what has been eating it. Photo backup and app updates will empty a daily allowance while the phone sits in your pocket. Set both to wifi only before you fly.
9. You have run out and the app has not told you
How much data do you actually need in Turkey?
A week of ordinary travel use, meaning maps, messaging, searches and the odd upload, lands around 2GB to 3GB for most people. Turkey nudges it higher than that for a lot of travellers, because this is a country people photograph constantly and because you will lean on translation and maps more than you expect once you are off the tourist strip.
If you are working over hotspot or posting video every evening, buy the larger bundle at the start rather than topping up mid trip.
Three settings make a real difference before you fly. Turn off photo and video backup over mobile data. Turn off automatic app updates over mobile data. Download your map areas while you are still on wifi.
When a bundle empties, most travel eSIMs do not say so clearly. The line stays registered, the bars stay up, and nothing loads, which looks identical to the access point name fault in step 3. Check the app for remaining data before you start editing settings.
10. When it really is not your phone
How do I know if my Turkey eSIM is faulty?
One test settles it. If someone next to you has a phone working on a Turkish network in the same spot, or your own home SIM can roam there, then coverage is fine and the problem is your travel line.
The clearest evidence is the status bar showing one line on a Turkish network while the travel line reads No Service, at the same moment, in the same place. That rules out the location, the handset and every setting at once.
At that point stop adjusting things and contact whoever sold it to you. Tell them what the phone shows under network operator, whether the line is registered, and how much data their app says you have used. Those three facts let a decent support team check the line from their side in minutes instead of sending you the installation guide again.
What to do if you are in Turkey right now with no data
Work down this list and stop as soon as you are online.
Turn data roaming on for the travel line. Set mobile data to that line. Check an access point name is set and nothing else is filled in. Put network selection on Automatic. Flight mode on for thirty seconds, then off. Still nothing? Select Vodafone by hand. If none of that works, it is not your phone.
If you need to be online in the next ten minutes, Istanbul and Antalya airports have wifi, as does almost every cafe in the country. Get connected first and sort the refund out afterwards. Any provider worth buying from will refund an eSIM that never carried data.
What the message on your screen actually means
No Service on the travel line
The line is on and cannot find a network it is allowed to join. Either roaming is off, or the phone is sitting on Turkcell or Türk Telekom instead of Vodafone, or you are in one of the gaps in step 7. Steps 1, 5 and 7.
Searching, and it never stops
The phone is scanning and being turned away. Classic sign of manual selection pointing at the wrong operator. Put it back to Automatic, and if that fails choose Vodafone by hand.
SOS or Emergency Calls Only
A network is there and will take an emergency call but not you as a data subscriber. On a travel eSIM that nearly always means the plan has not started, has expired, or the profile is not properly enabled. Check the app before touching settings.
Full bars, nothing loads
You are registered and the data path is broken. That is the access point name in step 3, or mobile data still pointing at your home SIM in step 2. Signal strength tells you nothing about whether data is flowing.
Could not activate mobile data network
The network took the registration and refused the data session. Usually the access point name is wrong, or a username has been filled in that should be empty. Delete the entry, add it again with only the access point name, and save.
The Turkey rule that does not apply to your eSIM
Will Turkey block my phone after 120 days?
Not on a roaming eSIM, and this is the single most misunderstood thing about phones in Turkey.
Turkey registers handsets against Turkish SIM cards. Put a Turkish SIM in a phone brought from abroad and a 120 day clock starts. Past that point the handset itself is blocked from Turkish networks, not just that SIM, and getting it unblocked means paying the official registration fee at a PTT office. That fee is reset every year and was set at ₺54,240 for 2026, which is not a casual sum for a holiday workaround.
Roaming does not start the clock. A travel eSIM connects you as a visitor on a Turkish network rather than as a Turkish subscriber, so the handset is never registered against a local account and never enters the blocking system. This is the practical reason a lot of long stay visitors and returning travellers use an eSIM in Turkey rather than picking up a local SIM at the airport.
If you are staying past 120 days and want a Turkish number, that is a different decision and the fee is part of it. For a holiday, a work trip, or a few months of moving around, the eSIM route avoids the question entirely.
Phone by phone, the settings that differ
iPhone
Most of it is automatic. The access point name arrives with the profile and the row is often locked, which is normal rather than a fault. Check Data Roaming on the travel line and the Mobile Data selector at the top of the Mobile Data screen, and switch off Allow Mobile Data Switching.
Samsung
Samsung is where the access point name usually needs adding by hand, and it is the most common Android fault we see. Settings, then Connections, then Mobile networks, then Access Point Names, and select the travel line at the top of that screen before you add anything.
Pixel and other Android
Closer to the iPhone, but open SIM manager and confirm which line is set for mobile data. Android will happily leave a second line switched on and idle.
A checklist you can screenshot
Data roaming on for the travel line, off for the home SIM. Mobile data set to the travel line. Data switching off. Access point name present, username and password empty. Network selection Automatic, or Vodafone by hand. Operator name on screen is a Turkish one. Flight mode on and off for ten seconds. App checked for data used and start date.
Questions people ask about Turkey eSIMs
Does an eSIM work in Turkey?
Yes. All three Turkish networks support roaming eSIM profiles, coverage is strong across the country, and 5G is live in the larger cities.
Will I get a Turkish phone number?
Not with a data eSIM. You keep your own number on your home SIM for calls and texts, and the eSIM carries data only. WhatsApp and iMessage keep working because they run on data, and WhatsApp is what most communication in Turkey actually happens on.
Does a Turkey eSIM work in Northern Cyprus?
No. Northern Cyprus runs its own operators and counts as a separate destination for mobile data, whatever the flights and ferries suggest. If you are crossing over, plan coverage for it separately.
Does it work on the Greek islands day trips?
No. Kos, Rhodes, Samos and the rest are Greece, and a Turkey plan stops at the water. Your phone may even pick up a Greek network while you are still in Bodrum or Kuşadası, which is worth watching if your home SIM has roaming on.
Can I use it as a hotspot?
On our plans, yes. Not every provider allows it and a few block it quietly rather than saying so, which is worth checking before you rely on it for a laptop.
Can I top up if I run out?
On our plans, yes, and the top up lands on the same line so you do not reinstall anything. Some providers make you buy a whole new eSIM instead, which means a second install and a second activation.
Is it better to buy a SIM at Istanbul airport?
Only if you genuinely need a Turkish number. The desks are real, but you will queue after a flight with your passport, pay airport prices, and start the 120 day handset clock described above. An eSIM installed at home has you connected before the seatbelt sign goes off and avoids all of that.
If you would rather not do this again
Most of the trouble above comes from plans that hide which network they use, leave you guessing at settings, or start the clock the moment you pay. Ours run on Vodafone Turkey, support sends the access point name if your phone needs it, and the days only start counting when the line first connects inside the country.
Turkey plans start at $1.29 for 1GB over 7 days, with 3GB for 30 days at $2.49 and 5GB for 30 days at $3.49. Install it at home, turn roaming on when you land, and that is the whole job.
