Yes, in 2026, there are numerous SIM and eSIM options that provide comprehensive coverage across the entire European continent. Thanks to the "Roam Like at Home" regulations within the European Union (EU) and the European Economic Area (EEA), a SIM card purchased in one member country (like France or Germany) will work in all others at no extra cost. Popular providers like Orange, Vodafone, and LycaMobile offer "Europe Travel" SIMs specifically designed for tourists, often including 20GB to 50GB of data and unlimited calls across the region. For the ultimate convenience, many travelers now prefer eSIMs from providers like Airalo or Holafly, which allow you to download a digital data plan to your phone before you even land. These digital plans typically cover 30 to 40 European countries, including non-EU nations like Switzerland and the UK. When choosing a plan, it is vital to check if it includes "roaming" in the specific Balkan or non-EU countries you plan to visit, as data costs in those regions can sometimes be excluded from standard "All-Europe" packages.