Saily’s plans that carry the label “UNLIMITED” for Serbia actually provide a limited high‑speed data allowance. The Serbia UNLIMITED plans give 3 GB per day for 5 to 30 days, and once the 3 GB/day quota is used the connection throttles to 1024 kbps. The Global UNLIMITED 30‑day plan also offers 30 GB total, after which speed is reduced. Because of these caps, Saily does not supply a truly unlimited high‑speed eSIM for Serbia.
If a traveler needs large data volumes without a speed reduction after a quota is used, a fixed‑data plan is available. For example, Saily offers a 20 GB plan valid for 30 days at $26.99 USD, or a 30 GB plan valid for 90 days at $119.99 USD. These plans allow full‑speed data until the cap is reached, after which the connection simply shuts off rather than throttling. These options may be more cost effective for users who consume a lot of data.