Before you start

Your original passport — the line is registered to it and any official store will ask
Awareness of the 120-day IMEI clock if your phone was bought abroad, and that registering it is expensive
A pre-loaded, pre-activated eSIM if you want data the moment you land at Adnan Menderes
For IMEI registration later: a residence permit / foreigner ID starting 99, and an e-Devlet password

Step-by-step

1
Bridge your first days with a data-only eSIM
Before you fly, install an Airalo or Holafly Türkiye eSIM so you have data the moment you land at Adnan Menderes — useful precisely because the İZBAN platform is in the terminal and you'll want live times. Download, install and ideally activate it on home Wi-Fi: BTK restricted access to most foreign eSIM apps and sites inside Türkiye in July 2025, so opening the app or topping up locally often needs a VPN.
Mobile appWho: You, before departure5-10 minutes to install; activates on landingAiralo ~US$8 / 3 GB up to ~US$26 / 20 GB; Holafly unlimited daily and monthly plans
2
Buy a prepaid SIM at an official carrier store
For a real Turkish number go to an official Turkcell, Vodafone or Türk Telekom store with your passport; the line is registered to it on the spot. Skip the airport counters — the Alsancak and Konak stores and the ones in Forum Bornova, Optimum and Agora are cheaper for the same pack. Ask for a tourist welcome pack (typically ~20 GB plus minutes) or a standard prepaid hazır kart line.
In personWho: You + carrier store staff20-40 minutes in storeTourist pack ~US$30-55 for ~20 GB; airport markups higher
3
Understand and handle the 120-day IMEI trap
A phone bought abroad runs on Turkish networks for about 120 days from your entry date, then its IMEI is BLOCKED for calls and mobile data — Wi-Fi keeps working, which is why people misdiagnose it as a SIM fault. To keep using the device you must register it, paying the annual government fee (over 54,000 TL, about US$1,260 for 2026) via e-Devlet or the tax office with your residence permit and e-Devlet login. Only one phone per passport roughly every two years, and BTK is closing the dual-SIM workaround.
OnlineWho: You (needs a residence permit / foreigner ID)Within 120 days of entry; registration itself about a dayOver 54,000 TL (~US$1,260) for 2026
4
Top up (kontör) and pick a data package
Prepaid balance is topped up as kontör at any carrier store, supermarket, kiosk, online or in the carrier's app, then spent on a monthly data-and-minutes package. Renew each cycle, usually 30 days, to keep your data, and keep the line active with periodic use so the number isn't recycled.
Mobile appWho: YouA few minutes per top-upMonthly packages from ~US$10-20 depending on data
5
Set up WhatsApp and order home fibre
WhatsApp is the default for messaging and calls in Türkiye — register it on your Turkish number once the SIM is live. For a flat, order fibre from Türk Telekom (widest coverage), Turkcell Superonline or Vodafone Home, checking the specific building on the provider's address/altyapı look-up first. Alsancak, Bayraklı, Bornova and Karşıyaka are well served; older stock in inner Konak and the peninsula villages is much more of a lottery, which matters if you work from home.
OnlineWho: You + home-internet providerInstall typically a few days to about two weeksHome fibre from ~US$15-25/month

Documents you’ll need

Original passport, with the entry stamp or date — needed to buy the SIM and to register a phone
Residence permit / foreigner ID number (99…) — required for IMEI registration via e-Devlet
Your phone's IMEI number (dial *#06# to display it)
e-Devlet password, for online IMEI registration and to check device status

Things most newcomers don’t know

The 120-day IMEI block is the single biggest gotcha, and at over 54,000 TL for 2026 the fee can exceed the phone's value.

Newcomers assume a working SIM means a permanently working phone. It doesn't — the network whitelists handsets by IMEI, and Wi-Fi keeps working after the block, so the failure looks like a carrier problem rather than a legal one. Many people simply buy a cheap Turkish phone instead.

Source: Türkiye Today / BTK e-Devlet (2026 fee)

Buy and activate your arrival eSIM before you board, not after you land.

BTK blocked most foreign eSIM apps and websites inside Türkiye in July 2025, so installing or topping up locally usually needs a VPN. It matters more here than elsewhere because the cheap way into the city — the İZBAN from the terminal — needs live departure information to use confidently.

Source: eSIM provider guidance (2026)

The carrier difference doesn't show in İzmir; it shows on the Çeşme and Karaburun peninsulas.

In Alsancak or Bornova all three networks are fine and the cheap option is the right one. Out on the peninsula roads, in the hill villages and along the coast, Turkcell's coverage pulls clearly ahead — so if your weekends are out there, the premium is buying something real.

Source: Carrier coverage maps and regional user reports (2026)

Carrier tourist welcome packs bundle far more data than a standard entry plan.

They typically carry about 20-25 GB plus minutes and are aimed at arrivals, but anyone with a passport visiting within roughly 90 days qualifies — the simplest high-data option for a first month before you settle on a longer-term line.

Source: Turkcell / Türk Telekom tourist SIM pages (2026)

Common mistakes to avoid

Not knowing about the IMEI rule and being cut off around day 120 — suddenly no calls or mobile data, only Wi-Fi.
Trying to extend usage by swapping the SIM into a second or eSIM slot for another 120 days; BTK is closing that loophole.
Buying an eSIM expecting to install or top it up after landing — foreign eSIM apps are restricted inside Türkiye.
Renting a peninsula or hill-village place for the view without checking mobile and fibre coverage at that specific address.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.