Is my SouthESIM for Greece also valid if I visit neighboring countries like Turkey or Albania?

It's important to clarify that your SouthESIM plan for Greece is specifically for use within Greece and the European Union. If your travels include a stop in countries like Turkey (perhaps a cruise visit to Kuşadası) or a ferry ride to Albania from Corfu, your connection will stop working. These countries are outside the EU roaming zone, so for seamless connectivity in those areas, you would need a separate SouthESIM plan or one of our multi-country bundles that includes those specific regions.