Turkey straddles Europe and Asia with excellent mobile coverage from Turkcell, Vodafone Turkey, and Türk Telekom — Istanbul, Ankara, Izmir, and the Mediterranean coast have strong 4G/LTE and growing 5G. Physical SIM purchase requires passport registration and can take an hour at the airport; a Turkey eSIM skips the entire process. Activate before you fly and your phone is online the moment you land at Istanbul (IST), Antalya, or Dalaman — ready for Uber, Google Translate, and the winding alleys of Sultanahmet.
Best time to visit: April–May and September–October
AskHeidi eSIMs in Turkey connect to Merhaba via the Airalo Partners Network. The specific carrier is shown on each plan below.

Three steps. No store. No swapping.
“Used it in Japan for 2 weeks. Setup took literally 1 minute. Flawless 4G the entire trip.”
“Way cheaper than my carrier's roaming pass. Paid $12 for my whole Europe trip. Speeds were top tier.”
“Scanned the QR code at the airport, connected before I even got through customs. Magic.”