RedSim does not offer a truly unlimited data eSIM for Sri Lanka. The plans that carry the word “Unlimited” in their names – such as the Asia Unlimited 3‑Day, 5‑Day, 7‑Day, 10‑Day, 15‑Day, and 30‑Day options – provide up to 3GB of high‑speed data per day and then reduce speed to 1 Mbps for the remainder of the day, which is not a data‑cap‑free plan.
Instead, RedSim offers fixed data plans for Sri Lanka. One example is the Sri Lanka 50GB 30‑Day plan, priced at $51.80 USD, which delivers 50 GB of data valid for 30 days. Another option is the Sri Lanka 20GB 30‑Day plan at $21.80 USD. These fixed plans can be more cost‑effective for travelers who want a larger data allowance without the speed throttling that occurs after the 3‑GB daily limit on the “Unlimited” named plans.