Nomad eSIM in Turkey

I purchased the Nomad eSIM for use in Europe, including Turkey. I read somewhere that it has to be activated before arriving in Turkey, which is fine, since I activated it and used it first in Germany so it worked fine upon arriving in Istanbul.

HOWEVER, one thing that is rarely mentioned it that if you run out of data WHILE in Turkey, there is no way for you to top up. The app just won’t connect, even on a WiFi network. So make sure you have enough data before you arrive.