TL;DR: If you live in Turkey and you are flying to Europe or the United States, buy the destination eSIM before you leave. RoameSIM checkout opens in Turkey. There is no app and no account. Install the QR on home or hotel Wi-Fi. Turn the line on after you land. A Europe or USA plan will not give you data while you are still in Turkey.
Why buy from Turkey before the flight
Independent tests in early September 2026 reported that several large eSIM store websites did not load on Turkish mobile networks. Profiles already on the phone kept working. The failure is the purchase step, not the radio.
RoameSIM is a website with guest checkout. It opens in Turkey. You can pay, receive the QR by email, and finish install on Wi-Fi even if another brand’s app store page will not open.
For visitors coming into Turkey, use buy and install a Turkey eSIM before you travel instead of this page.
Europe trips
Open Europe eSIM plans if you will cross more than one country (France + Italy, Germany + Netherlands, a UK stop if the plan lists it). Read the country list on the plan card. Turkey is not in that list.
Staying in one country the whole time can be cheaper with a local plan: Germany, France, Spain, Italy, or United Kingdom.
More route advice: best eSIM for Europe.
United States trips
Open USA eSIM plans for New York, California, Florida, or a multi-state road trip. National coverage is strongest in cities and along highways. Download offline maps for parks. Guide: best eSIM for USA.
Checkout and install (no app)
- Use Wi-Fi or a connection that loads roamesim.io.
- Choose Europe, USA, or a single-country plan. Pay as a guest. Details: travel eSIM without an app.
- Install from the email QR on Wi-Fi. Use the Installation Assistant if the menus are unclear.
- Keep the travel line off in Turkey.
- After landing, turn it on, set it for mobile data, enable data roaming on that line, keep roaming off on the Turkish SIM.
On the phone the line is labelled Travel-Connect.
Do not mix the plans
- Need data in Istanbul until the flight? That is a Turkey eSIM.
- Need data after you land in Paris or New York? That is Europe or USA.
- Two trips, two profiles, if both periods overlap. Dual-SIM phones can hold more than one eSIM; only one is usually the data line at a time.
Get the destination plan
Frequently Asked Questions
Can I buy a Europe eSIM while I am in Turkey?
Yes on RoameSIM. The website opens in Turkey. Pay in the browser, get the QR by email, install on Wi-Fi, and keep the line off until you are in a covered European country.
Will a Europe or USA eSIM work inside Turkey?
No. Those plans are for the destination, not for Turkish networks. For data in Turkey buy a <a href="/esim/turkey">Turkey plan</a>.
Do I need Airalo or Saily’s app?
Not for RoameSIM. Guest checkout needs a browser, an email address, and a card. See <a href="/blog/travel-esim-without-an-app">travel eSIM without an app</a>.
When should I install?
On Wi-Fi before you go to the airport. An installed profile does not need the store website after take-off.
Is this a Turkish phone number?
No. RoameSIM plans are data-only. Keep your Turkish SIM for calls, SMS and bank codes.