If you’re travelling to Greece or Cyprus
You can use your plan minutes, texts and data allowances at no extra cost. However, during your stay you might connect to a Turkish network. As Turkey is outside of the EU, should this happen, you’II be charged to make and receive calls and send texts and picture messages.
You can prevent this from happening by only allowing your phone to connect to EU networks. To activate EU Roaming only text EUROAM to 150.