Yes, WhatsApp, FaceTime, and other voice/video calling apps work perfectly fine and without any restrictions when using your eSIM data in Turkey.
You can make and receive calls, send messages, and use all features of these applications just as you would in your home country. Turkey does not impose any government-level blocks or throttling on popular VoIP services like WhatsApp, FaceTime, or Google Meet. Your eSIM provides reliable mobile data access by connecting to one of Turkey's major networks, such as Türk Telekom or Vodafone, ensuring a smooth communication experience.
The exact network your eSIM connects to may vary depending on your specific plan, but it will always aim for the strongest available signal to support your calls and data needs throughout your travels in cities like Istanbul, Ankara, or Antalya.