TailSim does not provide a truly unlimited data eSIM for Sri Lanka. The plans that carry the word “Unlimited” in their name give 1 GB per day and, once that daily amount is reached, the speed is reduced to 512 kbps. Therefore, they are not unlimited in the sense of offering high‑speed data without limits.
Travelers who need a larger, unthrottled data allowance can choose one of TailSim’s fixed data plans for Sri Lanka. Examples include a 50 GB plan valid for 30 days, a 20 GB plan for 30 days, a 10 GB plan for 30 days, a 5 GB plan for 30 days, or a 3 GB plan for 15 days. These fixed plans provide a set amount of high‑speed data without a speed reduction after a daily limit, and they can be more cost‑effective unless the user is an extremely heavy data consumer.