Roamingo does not provide an unlimited data eSIM for Serbia. Instead, the provider sells a series of fixed data plans that can be purchased for a set number of days. For example, travelers can choose from a 20 GB bundle valid for 30 days, a 10 GB bundle valid for 30 days, a 5 GB bundle for 30 days, a 3 GB bundle for 30 days, or a 2 GB bundle for 14 days. These options give clear data caps and validity periods, offering a more predictable cost structure for most users. If a traveler expects to use more data than the largest available bundle, they could consider purchasing multiple bundles or explore Roamingo’s pay‑as‑you‑go products, which allow additional data to be added as needed.