No, simpleSIM does not provide a truly unlimited high‑speed data plan for Thailand. Every plan that carries the word “Unlimited” in its name still lists a specific data cap of 1GB/day or 3GB/day, and after the daily allowance is reached the speed is throttled to a lower rate.
Travelers can instead select fixed data plans that offer larger, un‑throttled data bundles, such as the eSIM Thailand 20GB plan priced at $33.60 USD for 30 days or the eSIM Thailand 50GB plan at $56.00 USD for 180 days. These fixed data plans provide a larger amount of high‑speed data and are often more cost‑effective for most users.