Serbia is not part of the EU roaming zone, so most EU SIM cards and Europe eSIMs do not include Serbia in their main coverage, or include it with reduced data allowances and extra fees. Travelers from Germany, France, Italy, or other EU countries are often surprised by unexpected roaming charges when they cross into Serbia. The ETravelSim Serbia eSIM is purpose-built for Serbia on A1's network, with predictable pricing and full data allowance for the country. Always check whether your existing Europe eSIM explicitly includes Serbia before assuming coverage.