Likewise with EE with the roaming smart benefit. No issues in the Netherlands, Germany, Denmark, Sweden, Norway, Finland, Estonia, Latvia, Lithuania, Poland, Czech, Austria, Slovakia, Hungary, Romania or Bulgaria.
Turkey - needed a Turkcell sim, show your passport and you can get two ‘tourist package’ SIM cards, we got three between us (one for the Nighthawk
mobile router), and two smaller ones for each phone. Can’t remember exact price but cheap for the amount of data. Just be aware certain areas you get censored
on social media, just like this site
.
Greece, EE SIM fired back up no problems, Albania, same deal as Turkey - best value and coverage (cheap and even less hassle) are Vodaphone Albania, they work in Montenegro and Bosnia Hurzegovina as well (you need to top up enough to get you through those countries because you can’t outside of Albania) - bonus. Currently just arrived in Croatia and the EE SIM fired up again faultlessly. Never lost signal in any country they offer.
No reason to believe the EE SIM will become a problem now we are closer to home and no longer need to change it