Avelis eSIM does not currently provide an unlimited data plan for Serbia. The available options are fixed data plans, with the most generous plan granting 50GB of high‑speed data that is usable for 180 days at a price of $131.99 USD. Smaller bundles are also offered, such as a 20GB plan valid for 30 days, available at $19.99 USD, $48.99 USD, $54.99 USD when covering Serbia and neighboring countries, or a 20GB bundle valid for 90 days for $57.99 USD. These fixed‑data plans are a more cost‑effective choice for most travelers unless they anticipate extremely heavy data usage, in which case a higher‑cap bundle may be preferable.